/* roulang page: index */
:root {
            --color-primary: #2E8B57;
            --color-primary-dark: #1A4C2E;
            --color-primary-gradient-start: #2E8B57;
            --color-primary-gradient-end: #DAA520;
            --color-gold: #DAA520;
            --color-gold-dark: #C5964A;
            --color-bg: #FDF8F0;
            --color-bg-card: #FFFFFF;
            --color-text-heading: #1A4C2E;
            --color-text-body: #333333;
            --color-text-muted: #666666;
            --color-text-light: #999999;
            --color-border: #E8E8E8;
            --color-border-focus: #2E8B57;
            --color-white: #FFFFFF;
            --color-overlay: rgba(26, 76, 46, 0.7);
            --radius-card: 14px;
            --radius-btn: 20px;
            --radius-input: 8px;
            --radius-img: 8px;
            --radius-badge: 6px;
            --shadow-card: 0 4px 16px rgba(0,0,0,0.05);
            --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.12);
            --shadow-nav: 0 2px 10px rgba(0,0,0,0.08);
            --shadow-modal: 0 10px 40px rgba(0,0,0,0.15);
            --shadow-btn: 0 4px 12px rgba(46, 139, 87, 0.3);
            --transition-base: all 0.3s ease;
            --font-sans: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --container-max: 1280px;
            --section-spacing: 80px;
            --section-spacing-tablet: 48px;
            --section-spacing-mobile: 32px;
        }
        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
        body {
            font-family: var(--font-sans);
            font-size: 16px;
            line-height: 1.7;
            color: var(--color-text-body);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a { color: var(--color-primary); text-decoration: none; transition: var(--transition-base); }
        a:hover { color: var(--color-gold); }
        a:focus-visible { outline: 2px solid var(--color-gold); outline-offset: 2px; border-radius: 4px; }
        img { max-width: 100%; height: auto; display: block; border-radius: var(--radius-img); }
        ul, ol { list-style: none; }
        h1, h2, h3, h4, h5, h6 { color: var(--color-text-heading); font-weight: 700; line-height: 1.3; }
        .container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }
        .section { padding: var(--section-spacing) 0; }
        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { font-size: 2.2rem; margin-bottom: 16px; position: relative; display: inline-block; }
        .section-title h2::after { content: ''; display: block; width: 60px; height: 4px; background: linear-gradient(90deg, var(--color-primary), var(--color-gold)); border-radius: 2px; margin: 12px auto 0; }
        .section-title p { font-size: 1.1rem; color: var(--color-text-muted); max-width: 640px; margin: 0 auto; }
        .btn {
            display: inline-flex; align-items: center; justify-content: center; gap: 8px;
            font-size: 16px; font-weight: 600; line-height: 1; padding: 14px 36px; border-radius: var(--radius-btn);
            border: none; cursor: pointer; transition: var(--transition-base); white-space: nowrap;
            text-decoration: none; font-family: var(--font-sans);
        }
        .btn:focus-visible { outline: 2px solid var(--color-gold); outline-offset: 2px; }
        .btn-primary {
            background: linear-gradient(135deg, var(--color-primary-gradient-start), var(--color-primary-gradient-end));
            color: var(--color-white); box-shadow: var(--shadow-btn);
        }
        .btn-primary:hover { background: linear-gradient(135deg, var(--color-primary-gradient-end), var(--color-primary-gradient-start)); transform: scale(1.02); color: var(--color-white); }
        .btn-primary:active { box-shadow: inset 0 2px 5px rgba(0,0,0,0.2); }
        .btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }
        .btn-secondary {
            background: transparent; color: var(--color-white); border: 1.5px solid var(--color-white);
        }
        .btn-secondary:hover { background: rgba(255,255,255,0.12); color: var(--color-white); }
        .btn-outline {
            background: transparent; color: var(--color-primary); border: 1.5px solid var(--color-primary);
        }
        .btn-outline:hover { background: rgba(46, 139, 87, 0.08); color: var(--color-primary-dark); }
        .badge {
            display: inline-block; padding: 4px 12px; border-radius: var(--radius-badge);
            font-size: 0.8rem; font-weight: 500; line-height: 1.4;
        }
        .badge-gold { background: rgba(218, 165, 32, 0.18); color: var(--color-gold-dark); }
        .badge-green { background: rgba(46, 139, 87, 0.12); color: var(--color-primary); }
        .badge-white { background: rgba(255,255,255,0.2); color: var(--color-white); }
        .grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; }
        .grid-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 28px; }
        .grid-4 { display: grid; grid-template-columns: 1fr 1fr 1fr 1fr; gap: 24px; }
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .mt-24 { margin-top: 24px; }
        .mt-32 { margin-top: 32px; }
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }

        /* ===== Header & Nav ===== */
        .site-header {
            position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
            height: 64px; background: rgba(253, 248, 240, 0.88);
            backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(232, 232, 232, 0.6); box-shadow: var(--shadow-nav);
        }
        .header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
        .site-logo { display: flex; align-items: center; gap: 10px; font-size: 1.5rem; font-weight: 800; color: var(--color-primary-dark); text-decoration: none; }
        .site-logo:hover { color: var(--color-primary-dark); }
        .site-logo .logo-icon { width: 36px; height: 36px; background: linear-gradient(135deg, var(--color-primary), var(--color-gold)); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 1.1rem; font-weight: 700; }
        .site-logo .logo-text { letter-spacing: 1px; }
        .nav-list { display: flex; align-items: center; gap: 8px; }
        .nav-list a {
            display: block; padding: 8px 18px; font-size: 0.95rem; font-weight: 500;
            color: var(--color-text-body); border-radius: 8px; transition: var(--transition-base);
            position: relative;
        }
        .nav-list a:hover { color: var(--color-primary); background: rgba(46, 139, 87, 0.06); }
        .nav-list a.active { color: var(--color-primary); font-weight: 600; }
        .nav-list a.active::after { content: ''; position: absolute; bottom: 2px; left: 18px; right: 18px; height: 3px; background: var(--color-primary); border-radius: 2px; }
        .nav-cta { margin-left: 12px; }
        .nav-cta .btn { padding: 10px 28px; font-size: 0.95rem; }
        .nav-badge { display: inline-flex; align-items: center; gap: 4px; margin-left: 6px; background: #E84C3D; color: #fff; font-size: 0.7rem; padding: 2px 8px; border-radius: 10px; font-weight: 600; vertical-align: super; }
        .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 8px; background: none; border: none; }
        .hamburger span { display: block; width: 26px; height: 2.5px; background: var(--color-text-heading); border-radius: 2px; transition: var(--transition-base); }
        .mobile-overlay { display: none; }

        /* ===== Hero ===== */
        .hero {
            min-height: 100vh; display: flex; align-items: center; position: relative;
            background: linear-gradient(135deg, rgba(26, 76, 46, 0.85), rgba(46, 139, 87, 0.7)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding: 120px 0 80px; margin-top: 0; overflow: hidden;
        }
        .hero::after { content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 120px; background: linear-gradient(to top, var(--color-bg), transparent); pointer-events: none; }
        .hero-content { position: relative; z-index: 2; max-width: 780px; }
        .hero-badge { display: inline-block; background: rgba(255,255,255,0.15); backdrop-filter: blur(6px); padding: 6px 18px; border-radius: 20px; color: #fff; font-size: 0.9rem; margin-bottom: 24px; border: 1px solid rgba(255,255,255,0.2); }
        .hero h1 { font-size: 3.4rem; font-weight: 800; color: #fff; line-height: 1.2; margin-bottom: 20px; letter-spacing: 1px; }
        .hero h1 span { background: linear-gradient(90deg, #fff, var(--color-gold)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .hero p { font-size: 1.2rem; color: rgba(255,255,255,0.9); line-height: 1.7; margin-bottom: 36px; max-width: 640px; }
        .hero-actions { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; }
        .hero-actions .btn { padding: 16px 44px; font-size: 1.05rem; }
        .hero-scroll { position: absolute; bottom: 40px; left: 50%; transform: translateX(-50%); z-index: 3; display: flex; flex-direction: column; align-items: center; gap: 6px; color: rgba(255,255,255,0.7); font-size: 0.8rem; animation: bounceDown 2s infinite; }
        .hero-scroll i { font-size: 1.4rem; }
        @keyframes bounceDown { 0%, 100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(10px); } }

        /* ===== Services ===== */
        .services-section { background: var(--color-white); }
        .service-card {
            background: var(--color-bg); border-radius: var(--radius-card); padding: 32px 28px;
            box-shadow: var(--shadow-card); border: 1px solid var(--color-border);
            transition: var(--transition-base); text-align: center;
        }
        .service-card:hover { box-shadow: var(--shadow-card-hover); border-color: var(--color-primary); transform: translateY(-4px); }
        .service-card .icon-wrap { width: 64px; height: 64px; margin: 0 auto 20px; background: linear-gradient(135deg, var(--color-primary), var(--color-gold)); border-radius: 16px; display: flex; align-items: center; justify-content: center; font-size: 1.8rem; color: #fff; }
        .service-card h3 { font-size: 1.25rem; margin-bottom: 12px; }
        .service-card p { font-size: 0.95rem; color: var(--color-text-muted); margin-bottom: 16px; }
        .service-card .card-link { font-weight: 600; font-size: 0.95rem; color: var(--color-primary); }
        .service-card .card-link:hover { color: var(--color-gold); }

        /* ===== Stats ===== */
        .stats-section { background: var(--color-primary-dark); color: #fff; position: relative; overflow: hidden; }
        .stats-section::before { content: ''; position: absolute; top: -60%; right: -20%; width: 500px; height: 500px; background: radial-gradient(circle, rgba(218,165,32,0.12), transparent 70%); border-radius: 50%; }
        .stats-section .section-title h2 { color: #fff; }
        .stats-section .section-title h2::after { background: linear-gradient(90deg, var(--color-gold), #fff); }
        .stats-section .section-title p { color: rgba(255,255,255,0.7); }
        .stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; position: relative; z-index: 1; }
        .stat-item { text-align: center; }
        .stat-circle { width: 120px; height: 120px; margin: 0 auto 16px; border-radius: 50%; background: linear-gradient(135deg, var(--color-primary), var(--color-gold)); display: flex; flex-direction: column; align-items: center; justify-content: center; border: 3px solid rgba(255,255,255,0.25); }
        .stat-circle .number { font-size: 2.4rem; font-weight: 800; color: #fff; line-height: 1.1; }
        .stat-circle .unit { font-size: 0.9rem; color: rgba(255,255,255,0.85); }
        .stat-item .label { font-size: 1rem; color: rgba(255,255,255,0.85); font-weight: 500; }

        /* ===== Latest News ===== */
        .news-section { background: var(--color-bg); }
        .news-list { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
        .news-card { display: flex; gap: 20px; background: var(--color-white); border-radius: var(--radius-card); padding: 20px; box-shadow: var(--shadow-card); border: 1px solid var(--color-border); transition: var(--transition-base); }
        .news-card:hover { box-shadow: var(--shadow-card-hover); border-color: var(--color-primary); }
        .news-thumb { width: 140px; height: 100px; flex-shrink: 0; border-radius: var(--radius-img); overflow: hidden; background: #f0f0f0; }
        .news-thumb img { width: 100%; height: 100%; object-fit: cover; }
        .news-info { flex: 1; min-width: 0; }
        .news-info .news-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 6px; font-size: 0.8rem; color: var(--color-text-muted); }
        .news-info .news-meta .badge { font-size: 0.7rem; padding: 2px 10px; }
        .news-info h3 { font-size: 1.05rem; margin-bottom: 6px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-info p { font-size: 0.88rem; color: var(--color-text-muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
        .news-info .news-link { font-size: 0.88rem; font-weight: 600; color: var(--color-primary); margin-top: 6px; display: inline-block; }
        .news-empty { grid-column: 1 / -1; text-align: center; padding: 48px 24px; background: rgba(232,232,232,0.3); border: 2px dashed var(--color-border); border-radius: var(--radius-card); color: var(--color-text-muted); font-size: 1rem; }

        /* ===== Cases ===== */
        .cases-section { background: var(--color-white); }
        .case-card { border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-card); border: 1px solid var(--color-border); transition: var(--transition-base); background: var(--color-white); }
        .case-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-3px); }
        .case-img { width: 100%; aspect-ratio: 16 / 9; overflow: hidden; background: #e8e8e8; }
        .case-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
        .case-card:hover .case-img img { transform: scale(1.05); }
        .case-body { padding: 20px 24px 24px; }
        .case-body h3 { font-size: 1.1rem; margin-bottom: 8px; }
        .case-body p { font-size: 0.92rem; color: var(--color-text-muted); margin-bottom: 12px; }
        .case-body .btn-outline { padding: 8px 24px; font-size: 0.9rem; }

        /* ===== Solutions ===== */
        .solutions-section { background: var(--color-bg); }
        .solution-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
        .solution-visual { border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-card); }
        .solution-visual img { width: 100%; height: 100%; object-fit: cover; min-height: 320px; }
        .solution-text h2 { font-size: 2rem; margin-bottom: 16px; }
        .solution-text h2 span { color: var(--color-primary); }
        .solution-text p { font-size: 1rem; color: var(--color-text-muted); margin-bottom: 20px; line-height: 1.8; }
        .solution-features { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; margin-bottom: 24px; }
        .solution-features li { display: flex; align-items: center; gap: 10px; font-size: 0.95rem; color: var(--color-text-body); }
        .solution-features li i { color: var(--color-primary); font-size: 1.1rem; }

        /* ===== FAQ ===== */
        .faq-section { background: var(--color-white); }
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item { border: 1px solid var(--color-border); border-radius: var(--radius-card); margin-bottom: 12px; overflow: hidden; transition: var(--transition-base); }
        .faq-item:hover { border-color: var(--color-primary); }
        .faq-question { display: flex; align-items: center; justify-content: space-between; padding: 20px 24px; cursor: pointer; background: rgba(232,232,232,0.2); font-size: 1.05rem; font-weight: 600; color: var(--color-text-heading); transition: var(--transition-base); border: none; width: 100%; text-align: left; font-family: var(--font-sans); }
        .faq-question:hover { background: rgba(46, 139, 87, 0.05); }
        .faq-question i { transition: transform 0.3s ease; font-size: 1.1rem; color: var(--color-primary); }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease, padding 0.3s ease; padding: 0 24px; background: var(--color-bg); }
        .faq-item.active .faq-answer { max-height: 400px; padding: 20px 24px; }
        .faq-answer p { font-size: 0.95rem; color: var(--color-text-muted); line-height: 1.8; }

        /* ===== Contact / CTA ===== */
        .contact-section { background: linear-gradient(135deg, var(--color-primary-dark), #0f2e1d); color: #fff; }
        .contact-section .section-title h2 { color: #fff; }
        .contact-section .section-title h2::after { background: linear-gradient(90deg, var(--color-gold), #fff); }
        .contact-section .section-title p { color: rgba(255,255,255,0.7); }
        .contact-grid { display: grid; grid-template-columns: 1.2fr 1fr; gap: 48px; align-items: start; }
        .contact-info h3 { font-size: 1.6rem; color: #fff; margin-bottom: 16px; }
        .contact-info p { color: rgba(255,255,255,0.8); margin-bottom: 24px; font-size: 1rem; line-height: 1.8; }
        .contact-detail { display: flex; align-items: center; gap: 14px; margin-bottom: 16px; color: rgba(255,255,255,0.85); font-size: 0.98rem; }
        .contact-detail i { width: 20px; color: var(--color-gold); font-size: 1.2rem; }
        .contact-form { background: var(--color-bg); border-radius: var(--radius-card); padding: 32px; box-shadow: var(--shadow-card); }
        .contact-form .form-group { margin-bottom: 18px; }
        .contact-form label { display: block; font-size: 0.9rem; font-weight: 600; color: var(--color-text-heading); margin-bottom: 6px; }
        .contact-form input, .contact-form textarea { width: 100%; padding: 12px 16px; border: 1px solid var(--color-border); border-radius: var(--radius-input); font-size: 0.95rem; font-family: var(--font-sans); background: var(--color-white); color: var(--color-text-body); transition: var(--transition-base); }
        .contact-form input:focus, .contact-form textarea:focus { border-color: var(--color-border-focus); box-shadow: 0 0 0 3px rgba(46, 139, 87, 0.12); outline: none; }
        .contact-form textarea { resize: vertical; min-height: 100px; }
        .contact-form .btn { width: 100%; padding: 14px; font-size: 1.05rem; }

        /* ===== Footer ===== */
        .site-footer { background: var(--color-primary-dark); color: rgba(255,255,255,0.8); padding: 60px 0 0; }
        .footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; }
        .footer-brand .site-logo { color: #fff; margin-bottom: 16px; }
        .footer-brand p { font-size: 0.92rem; line-height: 1.8; color: rgba(255,255,255,0.65); }
        .footer-col h4 { color: #fff; font-size: 1.1rem; margin-bottom: 20px; position: relative; padding-bottom: 10px; }
        .footer-col h4::after { content: ''; position: absolute; bottom: 0; left: 0; width: 30px; height: 3px; background: var(--color-gold); border-radius: 2px; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: rgba(255,255,255,0.7); font-size: 0.92rem; transition: var(--transition-base); }
        .footer-col ul li a:hover { color: var(--color-gold); padding-left: 4px; }
        .footer-contact li { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; font-size: 0.92rem; color: rgba(255,255,255,0.7); }
        .footer-contact li i { width: 16px; color: var(--color-gold); }
        .footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; margin-top: 48px; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 12px; font-size: 0.88rem; color: rgba(255,255,255,0.5); }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .grid-4 { grid-template-columns: 1fr 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
            .contact-grid { grid-template-columns: 1fr; gap: 32px; }
            .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media (max-width: 768px) {
            :root { --section-spacing: var(--section-spacing-tablet); }
            .hamburger { display: flex; }
            .nav-list { display: none; }
            .nav-list.open { display: flex; flex-direction: column; position: fixed; top: 64px; left: 0; right: 0; background: var(--color-bg); padding: 20px 24px; box-shadow: var(--shadow-nav); z-index: 999; gap: 4px; max-height: calc(100vh - 64px); overflow-y: auto; }
            .nav-list.open a { padding: 14px 18px; width: 100%; border-radius: 8px; }
            .nav-list.open a.active::after { display: none; }
            .nav-list.open a.active { background: rgba(46, 139, 87, 0.08); }
            .nav-cta { margin-left: 0; margin-top: 8px; width: 100%; }
            .nav-cta .btn { width: 100%; justify-content: center; }
            .mobile-overlay { display: none; position: fixed; top: 64px; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.3); z-index: 998; }
            .mobile-overlay.show { display: block; }
            .hero h1 { font-size: 2.2rem; }
            .hero p { font-size: 1rem; }
            .hero-actions .btn { padding: 14px 32px; font-size: 0.95rem; }
            .grid-2, .grid-3 { grid-template-columns: 1fr; }
            .news-list { grid-template-columns: 1fr; }
            .news-card { flex-direction: column; }
            .news-thumb { width: 100%; height: 180px; }
            .solution-grid { grid-template-columns: 1fr; }
            .solution-visual { order: -1; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; }
            .stat-circle { width: 100px; height: 100px; }
            .stat-circle .number { font-size: 1.8rem; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer-bottom { flex-direction: column; text-align: center; }
            .section-title h2 { font-size: 1.7rem; }
            .contact-form { padding: 24px; }
        }
        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero h1 { font-size: 1.8rem; }
            .hero p { font-size: 0.92rem; }
            .hero-actions { flex-direction: column; align-items: stretch; }
            .hero-actions .btn { padding: 14px 24px; }
            .hero-scroll { display: none; }
            .stats-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
            .stat-circle { width: 84px; height: 84px; }
            .stat-circle .number { font-size: 1.5rem; }
            .solution-features { grid-template-columns: 1fr; }
            .news-thumb { height: 140px; }
        }

/* roulang page: category1 */
:root {
            --color-primary: #2E8B57;
            --color-primary-dark: #1A4C2E;
            --color-gold: #DAA520;
            --color-gold-dark: #C5964A;
            --color-bg: #FDF8F0;
            --color-bg-card: #FFFFFF;
            --color-text-heading: #1A4C2E;
            --color-text-body: #333333;
            --color-text-muted: #666666;
            --color-border: #E8E8E8;
            --color-white: #FFFFFF;
            --radius-card: 14px;
            --radius-btn: 20px;
            --radius-input: 8px;
            --radius-badge: 6px;
            --shadow-card: 0 4px 16px rgba(0,0,0,0.05);
            --shadow-card-hover: 0 8px 30px rgba(0,0,0,0.12);
            --shadow-nav: 0 2px 10px rgba(0,0,0,0.08);
            --shadow-modal: 0 10px 40px rgba(0,0,0,0.15);
            --font-family: 'Segoe UI', 'PingFang SC', Roboto, 'Helvetica Neue', sans-serif;
            --spacing-section: 80px;
            --container-max: 1280px;
            --transition: 0.3s ease;
        }

        *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

        body {
            font-family: var(--font-family);
            background: var(--color-bg);
            color: var(--color-text-body);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
        }

        img { max-width: 100%; height: auto; display: block; }
        a { text-decoration: none; color: inherit; transition: color var(--transition); }
        ul { list-style: none; }
        .container { max-width: var(--container-max); margin: 0 auto; padding: 0 24px; }

        /* Typography */
        h1, h2, h3, h4, h5 { color: var(--color-text-heading); font-weight: 700; line-height: 1.3; }
        h2 { font-size: 2rem; margin-bottom: 16px; }
        h3 { font-size: 1.35rem; margin-bottom: 10px; }
        p { margin-bottom: 12px; }

        .section-title { text-align: center; margin-bottom: 48px; }
        .section-title h2 { position: relative; display: inline-block; }
        .section-title h2::after {
            content: '';
            display: block;
            width: 60px;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-gold));
            margin: 12px auto 0;
            border-radius: 4px;
        }
        .section-title p { color: var(--color-text-muted); max-width: 640px; margin: 0 auto; font-size: 1.05rem; }

        /* Buttons */
        .btn {
            display: inline-flex; align-items: center; gap: 8px;
            padding: 14px 36px; border-radius: var(--radius-btn);
            font-weight: 600; font-size: 1rem; border: none; cursor: pointer;
            transition: all var(--transition); text-align: center;
            justify-content: center;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--color-primary), var(--color-gold));
            color: var(--color-white);
            box-shadow: 0 4px 15px rgba(46, 139, 87, 0.3);
        }
        .btn-primary:hover { transform: scale(1.02); background: linear-gradient(135deg, var(--color-gold), var(--color-primary)); }
        .btn-primary:active { box-shadow: inset 0 2px 5px rgba(0,0,0,0.2); }
        .btn-secondary {
            background: transparent; color: var(--color-white);
            border: 1.5px solid var(--color-white);
        }
        .btn-secondary:hover { background: rgba(255,255,255,0.1); }
        .btn-outline {
            background: transparent; color: var(--color-primary);
            border: 1.5px solid var(--color-primary);
        }
        .btn-outline:hover { background: rgba(46, 139, 87, 0.08); }
        .btn-gold {
            background: linear-gradient(135deg, var(--color-gold-dark), var(--color-gold));
            color: var(--color-white);
            box-shadow: 0 4px 15px rgba(197, 150, 74, 0.3);
        }
        .btn-gold:hover { transform: scale(1.02); }

        /* Header & Navigation */
        .site-header {
            position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
            background: rgba(253, 248, 240, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            box-shadow: var(--shadow-nav);
            height: 68px;
            display: flex; align-items: center;
        }
        .site-header .container {
            display: flex; align-items: center; justify-content: space-between;
            width: 100%;
        }
        .site-logo {
            display: flex; align-items: center; gap: 8px;
            font-weight: 700; font-size: 1.3rem; color: var(--color-text-heading);
        }
        .logo-icon {
            display: inline-flex; align-items: center; justify-content: center;
            width: 36px; height: 36px; border-radius: 8px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-gold));
            color: #fff; font-size: 1.2rem; font-weight: 700;
        }
        .logo-text { font-size: 1.15rem; letter-spacing: 1px; }
        .nav-list {
            display: flex; align-items: center; gap: 6px;
        }
        .nav-list a {
            padding: 8px 16px; border-radius: 8px; font-size: 0.92rem;
            font-weight: 500; color: var(--color-text-body); transition: all var(--transition);
        }
        .nav-list a:hover { background: rgba(46, 139, 87, 0.08); color: var(--color-primary); }
        .nav-list a.active { color: var(--color-primary); background: rgba(46, 139, 87, 0.1); }
        .nav-cta { margin-left: 12px; }
        .nav-badge {
            display: inline-flex; align-items: center; gap: 4px;
            background: #e74c3c; color: #fff; font-size: 0.7rem;
            padding: 4px 10px; border-radius: 12px; font-weight: 600;
            margin-left: 6px; letter-spacing: 0.5px;
        }
        .nav-badge i { font-size: 0.65rem; }
        .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; }
        .hamburger span { width: 26px; height: 2.5px; background: var(--color-text-heading); border-radius: 4px; transition: var(--transition); }

        /* Hero */
        .hero-solution {
            padding: 140px 0 80px;
            background: linear-gradient(135deg, rgba(26, 76, 46, 0.92), rgba(46, 139, 87, 0.85)), url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            color: var(--color-white);
            position: relative;
            overflow: hidden;
        }
        .hero-solution::before {
            content: '';
            position: absolute; top: 0; left: 0; right: 0; bottom: 0;
            background: linear-gradient(180deg, rgba(26,76,46,0.3) 0%, rgba(46,139,87,0.2) 100%);
            pointer-events: none;
        }
        .hero-solution .container { position: relative; z-index: 2; }
        .hero-solution h1 { font-size: 3rem; color: #fff; margin-bottom: 20px; max-width: 720px; }
        .hero-solution .hero-sub { font-size: 1.15rem; color: rgba(255,255,255,0.9); max-width: 600px; margin-bottom: 32px; line-height: 1.7; }
        .hero-solution .hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }
        .hero-solution .hero-meta { margin-top: 40px; display: flex; gap: 32px; flex-wrap: wrap; }
        .hero-solution .hero-meta span { font-size: 0.95rem; color: rgba(255,255,255,0.8); display: flex; align-items: center; gap: 8px; }
        .hero-solution .hero-meta i { color: var(--color-gold); }

        /* Stats / Data Badges */
        .stats-section { padding: 60px 0; background: var(--color-white); }
        .stats-grid {
            display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
            text-align: center;
        }
        .stat-item {
            padding: 24px 16px; border-radius: var(--radius-card);
            background: var(--color-bg); border: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .stat-item:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-4px); }
        .stat-number {
            font-size: 2.4rem; font-weight: 800;
            background: linear-gradient(135deg, var(--color-primary), var(--color-gold));
            -webkit-background-clip: text; -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .stat-label { font-size: 0.95rem; color: var(--color-text-muted); margin-top: 6px; }

        /* Features / 解决方案核心模块 */
        .features-section { padding: var(--spacing-section) 0; background: var(--color-bg); }
        .features-grid {
            display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
        }
        .feature-card {
            background: var(--color-bg-card); border-radius: var(--radius-card);
            padding: 32px 28px; box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border); transition: all var(--transition);
        }
        .feature-card:hover {
            box-shadow: var(--shadow-card-hover); border-color: var(--color-primary);
            transform: translateY(-4px);
        }
        .feature-icon {
            width: 56px; height: 56px; border-radius: 14px;
            background: linear-gradient(135deg, rgba(46,139,87,0.12), rgba(218,165,32,0.12));
            display: flex; align-items: center; justify-content: center;
            font-size: 1.5rem; color: var(--color-primary); margin-bottom: 18px;
        }
        .feature-card h3 { font-size: 1.2rem; }
        .feature-card p { color: var(--color-text-muted); font-size: 0.95rem; margin: 0; }

        /* Scenarios / 适用场景 */
        .scenarios-section { padding: var(--spacing-section) 0; background: var(--color-white); }
        .scenarios-grid {
            display: grid; grid-template-columns: repeat(2, 1fr); gap: 28px;
        }
        .scenario-item {
            display: flex; gap: 20px; align-items: flex-start;
            padding: 24px; border-radius: var(--radius-card);
            background: var(--color-bg); border: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .scenario-item:hover { box-shadow: var(--shadow-card-hover); }
        .scenario-icon {
            flex-shrink: 0; width: 48px; height: 48px; border-radius: 12px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-gold));
            display: flex; align-items: center; justify-content: center;
            color: #fff; font-size: 1.2rem;
        }
        .scenario-text h4 { font-size: 1.1rem; margin-bottom: 6px; }
        .scenario-text p { color: var(--color-text-muted); font-size: 0.92rem; margin: 0; }

        /* Process / 实施流程 */
        .process-section { padding: var(--spacing-section) 0; background: var(--color-bg); }
        .process-steps {
            display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
            counter-reset: step;
        }
        .process-step {
            text-align: center; padding: 28px 16px; position: relative;
            background: var(--color-bg-card); border-radius: var(--radius-card);
            box-shadow: var(--shadow-card); border: 1px solid var(--color-border);
            transition: var(--transition);
        }
        .process-step:hover { transform: translateY(-4px); box-shadow: var(--shadow-card-hover); }
        .process-step::before {
            counter-increment: step;
            content: counter(step);
            display: block; width: 40px; height: 40px; line-height: 40px;
            border-radius: 50%; margin: 0 auto 16px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-gold));
            color: #fff; font-weight: 700; font-size: 1.1rem;
        }
        .process-step h4 { font-size: 1.05rem; margin-bottom: 8px; }
        .process-step p { color: var(--color-text-muted); font-size: 0.9rem; margin: 0; }

        /* Cases / 案例展示（精简） */
        .cases-showcase { padding: var(--spacing-section) 0; background: var(--color-white); }
        .cases-grid {
            display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
        }
        .case-card {
            border-radius: var(--radius-card); overflow: hidden;
            box-shadow: var(--shadow-card); border: 1px solid var(--color-border);
            background: var(--color-bg-card); transition: var(--transition);
        }
        .case-card:hover { box-shadow: var(--shadow-card-hover); transform: translateY(-4px); }
        .case-card img { width: 100%; height: 200px; object-fit: cover; }
        .case-card .case-body { padding: 20px 24px 24px; }
        .case-card .case-body h4 { font-size: 1.05rem; margin-bottom: 6px; }
        .case-card .case-body p { color: var(--color-text-muted); font-size: 0.9rem; margin-bottom: 12px; }
        .case-tag {
            display: inline-block; padding: 4px 12px; border-radius: var(--radius-badge);
            background: rgba(218,165,32,0.15); color: var(--color-gold-dark);
            font-size: 0.78rem; font-weight: 500;
        }

        /* FAQ */
        .faq-section { padding: var(--spacing-section) 0; background: var(--color-bg); }
        .faq-list { max-width: 800px; margin: 0 auto; }
        .faq-item {
            border: 1px solid var(--color-border); border-radius: var(--radius-card);
            margin-bottom: 12px; overflow: hidden; background: var(--color-bg-card);
        }
        .faq-question {
            display: flex; justify-content: space-between; align-items: center;
            padding: 20px 24px; cursor: pointer; font-weight: 600;
            color: var(--color-text-heading); font-size: 1.02rem;
            background: var(--color-bg-card); transition: var(--transition);
        }
        .faq-question:hover { background: rgba(46,139,87,0.04); }
        .faq-question i { transition: transform var(--transition); color: var(--color-primary); }
        .faq-item.active .faq-question i { transform: rotate(180deg); }
        .faq-answer {
            padding: 0 24px; max-height: 0; overflow: hidden;
            transition: all 0.4s ease; background: var(--color-bg);
        }
        .faq-answer p { padding: 16px 0; color: var(--color-text-muted); font-size: 0.95rem; margin: 0; }
        .faq-item.active .faq-answer { max-height: 300px; }

        /* CTA section */
        .cta-section { padding: 60px 0; background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary)); color: #fff; text-align: center; }
        .cta-section h2 { color: #fff; font-size: 2rem; margin-bottom: 12px; }
        .cta-section p { color: rgba(255,255,255,0.9); max-width: 600px; margin: 0 auto 28px; font-size: 1.05rem; }
        .cta-section .btn { font-size: 1.05rem; padding: 16px 48px; }

        /* Footer */
        .site-footer { background: var(--color-primary-dark); color: rgba(255,255,255,0.85); padding: 60px 0 0; }
        .site-footer .container { padding-bottom: 24px; }
        .footer-grid {
            display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 40px;
            margin-bottom: 32px;
        }
        .footer-brand .site-logo { color: #fff; margin-bottom: 16px; display: inline-flex; }
        .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.7); }
        .footer-col h4 { color: #fff; font-size: 1rem; margin-bottom: 16px; font-weight: 600; }
        .footer-col ul li { margin-bottom: 10px; }
        .footer-col ul li a { color: rgba(255,255,255,0.7); font-size: 0.9rem; transition: var(--transition); }
        .footer-col ul li a:hover { color: var(--color-gold); }
        .footer-contact li { display: flex; align-items: center; gap: 10px; color: rgba(255,255,255,0.7); font-size: 0.9rem; margin-bottom: 10px; }
        .footer-contact i { width: 18px; color: var(--color-gold); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px;
            display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
            font-size: 0.85rem; color: rgba(255,255,255,0.5);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .features-grid { grid-template-columns: repeat(2, 1fr); }
            .cases-grid { grid-template-columns: repeat(2, 1fr); }
            .process-steps { grid-template-columns: repeat(2, 1fr); }
            .stats-grid { grid-template-columns: repeat(2, 1fr); }
            .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
        }

        @media (max-width: 768px) {
            :root { --spacing-section: 48px; }
            .hamburger { display: flex; }
            .nav-list {
                position: fixed; top: 68px; left: 0; right: 0; bottom: 0;
                background: var(--color-bg); flex-direction: column;
                padding: 32px 24px; gap: 12px; align-items: stretch;
                transform: translateX(100%); transition: transform 0.35s ease;
                box-shadow: var(--shadow-modal); z-index: 999;
                overflow-y: auto;
            }
            .nav-list.open { transform: translateX(0); }
            .nav-list a { padding: 14px 20px; font-size: 1rem; border-radius: 10px; }
            .nav-cta { margin-left: 0; margin-top: 8px; }
            .nav-badge { align-self: flex-start; margin-left: 0; margin-top: 4px; }

            .hero-solution { padding: 120px 0 60px; }
            .hero-solution h1 { font-size: 2rem; }
            .hero-solution .hero-sub { font-size: 1rem; }
            .hero-solution .hero-actions { flex-direction: column; align-items: flex-start; }
            .hero-solution .hero-meta { flex-direction: column; gap: 12px; }

            .section-title h2 { font-size: 1.6rem; }
            .features-grid { grid-template-columns: 1fr; }
            .scenarios-grid { grid-template-columns: 1fr; }
            .process-steps { grid-template-columns: 1fr; }
            .cases-grid { grid-template-columns: 1fr; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
            .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .cta-section h2 { font-size: 1.5rem; }
            .cta-section .btn { width: 100%; }
            .stat-number { font-size: 1.8rem; }
        }

        @media (max-width: 520px) {
            .container { padding: 0 16px; }
            .hero-solution h1 { font-size: 1.6rem; }
            .hero-solution .hero-sub { font-size: 0.92rem; }
            .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
            .stat-item { padding: 16px 12px; }
            .stat-number { font-size: 1.5rem; }
            .feature-card { padding: 24px 20px; }
            .scenario-item { flex-direction: column; padding: 20px; }
            .faq-question { padding: 16px 18px; font-size: 0.95rem; }
            .footer-grid { gap: 24px; }
            .footer-bottom { flex-direction: column; text-align: center; }
        }

        /* Scroll indicator (hero) */
        .scroll-indicator {
            position: absolute; bottom: 30px; left: 50%; transform: translateX(-50%);
            color: rgba(255,255,255,0.6); font-size: 1.4rem;
            animation: bounce 2s infinite;
            z-index: 3;
        }
        @keyframes bounce { 0%,100% { transform: translateX(-50%) translateY(0); } 50% { transform: translateX(-50%) translateY(10px); } }

        /* Misc utilities */
        .text-center { text-align: center; }
        .mt-16 { margin-top: 16px; }
        .gap-8 { gap: 8px; }
        .flex-wrap { flex-wrap: wrap; }
        .align-center { align-items: center; }

/* roulang page: article */
/* ===== Design Variables ===== */
    :root {
        --color-primary: #2E8B57;
        --color-primary-dark: #1A4C2E;
        --color-secondary: #DAA520;
        --color-secondary-light: #C5964A;
        --color-gold: #DAA520;
        --color-bg: #FDF8F0;
        --color-bg-card: #FFFFFF;
        --color-bg-light: #F5F0E8;
        --color-text: #333333;
        --color-text-dark: #1A4C2E;
        --color-text-muted: #666666;
        --color-text-light: #999999;
        --color-border: #E8E8E8;
        --color-border-light: #f0f0f0;
        --color-white: #FFFFFF;
        --color-overlay: rgba(26, 76, 46, 0.6);
        --font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
        --font-size-sm: 0.875rem;
        --font-size-base: 1rem;
        --font-size-lg: 1.125rem;
        --font-size-xl: 1.25rem;
        --font-size-2xl: 1.5rem;
        --font-size-3xl: 2rem;
        --font-size-4xl: 2.8rem;
        --line-height: 1.8;
        --line-height-heading: 1.3;
        --spacing-xs: 0.25rem;
        --spacing-sm: 0.5rem;
        --spacing-md: 1rem;
        --spacing-lg: 1.5rem;
        --spacing-xl: 2rem;
        --spacing-2xl: 3rem;
        --spacing-3xl: 5rem;
        --radius-sm: 6px;
        --radius-md: 8px;
        --radius-lg: 14px;
        --radius-xl: 20px;
        --shadow-sm: 0 2px 8px rgba(0,0,0,0.05);
        --shadow-md: 0 4px 20px rgba(0,0,0,0.06);
        --shadow-lg: 0 8px 30px rgba(0,0,0,0.12);
        --shadow-nav: 0 2px 10px rgba(0,0,0,0.08);
        --transition: all 0.3s ease;
        --max-width: 1280px;
    }

    /* ===== Reset & Base ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    html { scroll-behavior: smooth; }
    body {
        font-family: var(--font-family);
        font-size: var(--font-size-base);
        line-height: var(--line-height);
        color: var(--color-text);
        background-color: var(--color-bg);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
    }
    img { max-width: 100%; height: auto; display: block; }
    a { color: var(--color-primary); text-decoration: none; transition: var(--transition); }
    a:hover { color: var(--color-secondary); }
    a:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
    ul, ol { list-style: none; }
    h1, h2, h3, h4, h5, h6 { font-weight: 700; line-height: var(--line-height-heading); color: var(--color-text-dark); }
    .container { width: 100%; max-width: var(--max-width); margin: 0 auto; padding: 0 var(--spacing-xl); }
    @media (max-width: 768px) { .container { padding: 0 var(--spacing-md); } }

    /* ===== Typography ===== */
    .section-title { font-size: var(--font-size-3xl); text-align: center; margin-bottom: var(--spacing-lg); }
    .section-subtitle { font-size: var(--font-size-lg); text-align: center; color: var(--color-text-muted); margin-bottom: var(--spacing-2xl); max-width: 700px; margin-left: auto; margin-right: auto; }
    @media (max-width: 768px) { .section-title { font-size: var(--font-size-2xl); } .section-subtitle { font-size: var(--font-size-base); } }

    /* ===== Navigation ===== */
    .site-header {
        position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
        background: rgba(253, 248, 240, 0.92); backdrop-filter: blur(12px);
        border-bottom: 1px solid rgba(232, 232, 232, 0.5);
        box-shadow: var(--shadow-nav); height: 64px;
    }
    .header-inner {
        display: flex; align-items: center; justify-content: space-between;
        height: 64px; max-width: var(--max-width); margin: 0 auto; padding: 0 var(--spacing-xl);
    }
    .site-logo {
        display: flex; align-items: center; gap: var(--spacing-sm);
        font-size: 1.4rem; font-weight: 800; color: var(--color-primary-dark);
        text-decoration: none; white-space: nowrap;
    }
    .site-logo:hover { color: var(--color-primary-dark); }
    .logo-icon {
        display: inline-flex; align-items: center; justify-content: center;
        width: 36px; height: 36px; background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
        color: #fff; border-radius: var(--radius-md); font-size: 1.2rem; font-weight: 700;
    }
    .logo-text { font-size: 1.2rem; letter-spacing: 0.5px; }
    .nav-list { display: flex; align-items: center; gap: var(--spacing-lg); }
    .nav-list a {
        font-size: 0.95rem; font-weight: 500; color: var(--color-text-dark);
        padding: 6px 0; position: relative; transition: var(--transition);
        border-bottom: 2px solid transparent;
    }
    .nav-list a:hover { color: var(--color-primary); }
    .nav-list a.active { color: var(--color-primary); border-bottom-color: var(--color-primary); }
    .nav-cta { margin-left: var(--spacing-sm); }
    .nav-badge {
        display: inline-flex; align-items: center; gap: 4px;
        background: linear-gradient(135deg, #E74C3C, #C0392B); color: #fff;
        font-size: 0.7rem; font-weight: 700; padding: 2px 10px; border-radius: 20px;
        margin-left: 4px; white-space: nowrap; animation: pulse-badge 2s infinite;
    }
    @keyframes pulse-badge { 0%, 100% { opacity: 1; } 50% { opacity: 0.7; } }
    .hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px; background: none; border: none; }
    .hamburger span { display: block; width: 24px; height: 2px; background: var(--color-text-dark); border-radius: 2px; transition: var(--transition); }
    @media (max-width: 768px) {
        .hamburger { display: flex; }
        .nav-list { position: fixed; top: 64px; left: 0; right: 0; background: var(--color-bg); flex-direction: column; padding: var(--spacing-lg); gap: var(--spacing-md); box-shadow: var(--shadow-lg); transform: translateY(-120%); opacity: 0; pointer-events: none; transition: var(--transition); border-bottom: 2px solid var(--color-border); }
        .nav-list.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
        .nav-list a { width: 100%; text-align: center; padding: 10px 0; border-bottom: 1px solid var(--color-border-light); }
        .nav-list a.active { border-bottom-color: var(--color-primary); }
        .nav-cta { width: 100%; text-align: center; margin-left: 0; }
        .nav-badge { display: none; }
    }

    /* ===== Buttons ===== */
    .btn {
        display: inline-flex; align-items: center; justify-content: center; gap: 8px;
        font-size: var(--font-size-base); font-weight: 600; padding: 14px 36px;
        border-radius: var(--radius-xl); border: none; cursor: pointer;
        transition: var(--transition); text-decoration: none; white-space: nowrap;
        font-family: var(--font-family);
    }
    .btn:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
    .btn-primary {
        background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
        color: var(--color-white); box-shadow: 0 4px 16px rgba(46, 139, 87, 0.3);
    }
    .btn-primary:hover { background: linear-gradient(135deg, var(--color-secondary), var(--color-primary)); transform: scale(1.02); color: #fff; box-shadow: 0 6px 24px rgba(46, 139, 87, 0.4); }
    .btn-primary:active { box-shadow: inset 0 2px 5px rgba(0,0,0,0.15); transform: scale(0.98); }
    .btn-primary.disabled, .btn-primary:disabled { opacity: 0.5; pointer-events: none; }
    .btn-secondary {
        background: transparent; color: var(--color-white); border: 1.5px solid var(--color-white);
    }
    .btn-secondary:hover { background: rgba(255,255,255,0.1); color: var(--color-white); }
    .btn-outline {
        background: transparent; color: var(--color-primary); border: 1.5px solid var(--color-primary);
    }
    .btn-outline:hover { background: rgba(46, 139, 87, 0.08); color: var(--color-primary); }
    .btn-sm { padding: 8px 20px; font-size: 0.85rem; border-radius: var(--radius-lg); }

    /* ===== Article Banner ===== */
    .article-banner {
        position: relative; margin-top: 64px; min-height: 360px;
        display: flex; align-items: center; justify-content: center;
        background: linear-gradient(135deg, rgba(26, 76, 46, 0.85), rgba(46, 139, 87, 0.7)), url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        padding: var(--spacing-3xl) var(--spacing-xl);
    }
    .article-banner-content { text-align: center; max-width: 800px; color: var(--color-white); }
    .article-banner-content h1 {
        font-size: 2.4rem; font-weight: 800; color: var(--color-white);
        margin-bottom: var(--spacing-md); letter-spacing: 0.5px;
    }
    .article-meta {
        display: flex; flex-wrap: wrap; align-items: center; justify-content: center;
        gap: var(--spacing-md); font-size: 0.9rem; color: rgba(255,255,255,0.85);
    }
    .article-meta .category-tag {
        display: inline-block; background: var(--color-secondary); color: var(--color-text-dark);
        padding: 2px 14px; border-radius: 20px; font-size: 0.8rem; font-weight: 600;
    }
    .article-meta i { margin-right: 4px; }
    @media (max-width: 768px) {
        .article-banner { min-height: 260px; padding: var(--spacing-2xl) var(--spacing-md); }
        .article-banner-content h1 { font-size: 1.6rem; }
        .article-meta { font-size: 0.8rem; gap: var(--spacing-sm); }
    }

    /* ===== Breadcrumb ===== */
    .breadcrumb-wrap {
        background: var(--color-bg-light); padding: 12px 0; border-bottom: 1px solid var(--color-border);
    }
    .breadcrumb {
        display: flex; flex-wrap: wrap; align-items: center; gap: 6px;
        font-size: 0.85rem; color: var(--color-text-muted);
    }
    .breadcrumb a { color: var(--color-text-muted); text-decoration: none; }
    .breadcrumb a:hover { color: var(--color-primary); }
    .breadcrumb .sep { color: var(--color-border); margin: 0 2px; }
    .breadcrumb .current { color: var(--color-text); font-weight: 500; max-width: 300px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
    @media (max-width: 768px) { .breadcrumb { font-size: 0.78rem; } .breadcrumb .current { max-width: 160px; } }

    /* ===== Article Content ===== */
    .article-content-wrap { padding: var(--spacing-3xl) 0; }
    .article-content-inner {
        max-width: 800px; margin: 0 auto; padding: 0 var(--spacing-xl);
    }
    .article-body {
        font-size: 1.05rem; line-height: 1.8; letter-spacing: 0.5px;
        color: var(--color-text);
    }
    .article-body p { margin-bottom: 1.8em; }
    .article-body h2 { font-size: 1.6rem; margin-top: 2.2em; margin-bottom: 0.8em; color: var(--color-primary-dark); }
    .article-body h3 { font-size: 1.3rem; margin-top: 1.8em; margin-bottom: 0.6em; color: var(--color-primary-dark); }
    .article-body h4 { font-size: 1.1rem; margin-top: 1.4em; margin-bottom: 0.4em; color: var(--color-text-dark); }
    .article-body img { border-radius: var(--radius-md); box-shadow: var(--shadow-md); margin: 1.5em auto; }
    .article-body blockquote {
        border-left: 4px solid var(--color-primary); background: var(--color-bg-light);
        padding: 1em 1.5em; margin: 1.5em 0; border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
        color: var(--color-text-muted); font-style: italic;
    }
    .article-body pre, .article-body code {
        font-family: 'SFMono-Regular', 'Consolas', 'Liberation Mono', monospace;
        background: #f4f4f4; border-radius: var(--radius-sm);
    }
    .article-body code { padding: 2px 6px; font-size: 0.9em; }
    .article-body pre { padding: 1em; overflow-x: auto; margin: 1.5em 0; border: 1px solid var(--color-border); }
    .article-body pre code { background: none; padding: 0; }
    .article-body table { width: 100%; border-collapse: collapse; margin: 1.5em 0; }
    .article-body th, .article-body td { padding: 10px 14px; border: 1px solid var(--color-border); text-align: left; }
    .article-body th { background: var(--color-bg-light); font-weight: 600; }
    .article-body ul, .article-body ol { margin: 1em 0; padding-left: 1.5em; }
    .article-body li { margin-bottom: 0.4em; }
    .article-body ul li { list-style: disc; }
    .article-body ol li { list-style: decimal; }
    .article-body a { color: var(--color-primary); text-decoration: underline; }
    .article-body a:hover { color: var(--color-secondary); }

    .not-found-box {
        text-align: center; padding: var(--spacing-3xl) var(--spacing-xl);
        background: var(--color-bg-card); border-radius: var(--radius-lg);
        box-shadow: var(--shadow-md); border: 1px solid var(--color-border);
    }
    .not-found-box i { font-size: 3rem; color: var(--color-text-light); margin-bottom: var(--spacing-md); }
    .not-found-box h3 { font-size: 1.4rem; margin-bottom: var(--spacing-sm); }
    .not-found-box p { color: var(--color-text-muted); margin-bottom: var(--spacing-lg); }

    @media (max-width: 768px) {
        .article-content-inner { padding: 0 var(--spacing-md); }
        .article-body { font-size: 0.95rem; }
        .article-body h2 { font-size: 1.3rem; }
    }

    /* ===== Back to List ===== */
    .back-nav { text-align: center; margin-top: var(--spacing-2xl); }

    /* ===== Related Posts ===== */
    .related-section { background: var(--color-bg); padding: var(--spacing-3xl) 0; border-top: 1px solid var(--color-border); }
    .related-grid {
        display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-xl);
        margin-top: var(--spacing-xl);
    }
    .related-card {
        background: var(--color-bg-card); border-radius: var(--radius-lg);
        overflow: hidden; box-shadow: var(--shadow-md); transition: var(--transition);
        border: 1px solid var(--color-border-light);
    }
    .related-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
    .related-card img { width: 100%; height: 180px; object-fit: cover; }
    .related-card-body { padding: var(--spacing-lg); }
    .related-card-body h4 { font-size: 1rem; font-weight: 700; margin-bottom: 8px; color: var(--color-text-dark); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
    .related-card-body p { font-size: 0.85rem; color: var(--color-text-muted); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; margin-bottom: 8px; }
    .related-card-body .date { font-size: 0.78rem; color: var(--color-text-light); }
    @media (max-width: 768px) { .related-grid { grid-template-columns: 1fr; } }
    @media (min-width: 769px) and (max-width: 1024px) { .related-grid { grid-template-columns: repeat(2, 1fr); } }

    /* ===== CTA Section ===== */
    .cta-section {
        background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary));
        padding: var(--spacing-3xl) var(--spacing-xl); text-align: center; color: var(--color-white);
    }
    .cta-section h2 { font-size: var(--font-size-3xl); color: var(--color-white); margin-bottom: var(--spacing-md); }
    .cta-section p { font-size: var(--font-size-lg); color: rgba(255,255,255,0.85); margin-bottom: var(--spacing-xl); max-width: 600px; margin-left: auto; margin-right: auto; }
    .cta-section .btn-primary { background: var(--color-secondary); color: var(--color-text-dark); box-shadow: 0 4px 16px rgba(218, 165, 32, 0.4); }
    .cta-section .btn-primary:hover { background: #c49520; }
    @media (max-width: 768px) { .cta-section h2 { font-size: var(--font-size-2xl); } .cta-section p { font-size: var(--font-size-base); } }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--color-primary-dark); color: rgba(255,255,255,0.85);
        padding: var(--spacing-3xl) 0 var(--spacing-xl);
    }
    .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: var(--spacing-2xl); margin-bottom: var(--spacing-2xl); }
    .footer-brand .site-logo { color: #fff; font-size: 1.3rem; margin-bottom: var(--spacing-md); }
    .footer-brand p { font-size: 0.88rem; line-height: 1.7; color: rgba(255,255,255,0.7); margin-top: var(--spacing-sm); }
    .footer-col h4 { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: var(--spacing-md); }
    .footer-col ul li { margin-bottom: 10px; }
    .footer-col ul li a { color: rgba(255,255,255,0.7); font-size: 0.88rem; }
    .footer-col ul li a:hover { color: var(--color-secondary); }
    .footer-contact li { display: flex; align-items: center; gap: 8px; color: rgba(255,255,255,0.7); font-size: 0.88rem; }
    .footer-contact i { width: 16px; color: var(--color-secondary); }
    .footer-bottom { border-top: 1px solid rgba(255,255,255,0.15); padding-top: var(--spacing-lg); display: flex; justify-content: space-between; flex-wrap: wrap; gap: var(--spacing-md); font-size: 0.82rem; color: rgba(255,255,255,0.5); }
    @media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: var(--spacing-xl); } .footer-bottom { flex-direction: column; text-align: center; } }
    @media (max-width: 520px) { .footer-grid { grid-template-columns: 1fr; } }

    /* ===== Responsive Utilities ===== */
    @media (max-width: 576px) { .btn { padding: 12px 28px; font-size: 0.9rem; } }

/* roulang page: category3 */
/* ===== CSS Variables ===== */
        :root {
            --color-primary: #2E8B57;
            --color-primary-dark: #1A4C2E;
            --color-primary-light: #3DAF6A;
            --color-accent: #DAA520;
            --color-accent-dark: #C5964A;
            --color-accent-light: #F0D68A;
            --color-bg: #FDF8F0;
            --color-bg-card: #FFFFFF;
            --color-bg-dark: #1A4C2E;
            --color-text: #333333;
            --color-text-light: #666666;
            --color-text-lighter: #999999;
            --color-text-on-dark: #FFFFFF;
            --color-border: #E8E8E8;
            --color-border-light: #F0F0F0;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
            --shadow-nav: 0 2px 10px rgba(0, 0, 0, 0.08);
            --shadow-modal: 0 10px 40px rgba(0, 0, 0, 0.15);
            --radius-card: 14px;
            --radius-btn: 20px;
            --radius-input: 8px;
            --radius-img: 8px;
            --radius-badge: 6px;
            --radius-sm: 6px;
            --font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            --transition-base: 0.3s ease;
            --container-max: 1280px;
            --header-height: 60px;
            --spacing-section: 80px;
            --spacing-section-tablet: 48px;
            --spacing-section-mobile: 32px;
        }

        /* ===== Reset & Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }

        html {
            scroll-behavior: smooth;
            -webkit-text-size-adjust: 100%;
        }

        body {
            font-family: var(--font-family);
            font-size: 16px;
            line-height: 1.6;
            color: var(--color-text);
            background-color: var(--color-bg);
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

        a {
            text-decoration: none;
            color: var(--color-primary);
            transition: color var(--transition-base);
        }
        a:hover {
            color: var(--color-accent);
        }
        a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        img {
            max-width: 100%;
            height: auto;
            display: block;
            border-radius: var(--radius-img);
        }

        button,
        input,
        textarea,
        select {
            font-family: inherit;
            font-size: inherit;
            line-height: inherit;
            border: none;
            outline: none;
        }

        ul,
        ol {
            list-style: none;
        }

        h1,
        h2,
        h3,
        h4,
        h5,
        h6 {
            font-weight: 700;
            line-height: 1.3;
            color: var(--color-primary-dark);
        }

        /* ===== Container ===== */
        .container {
            width: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }

        /* ===== Header & Navigation ===== */
        .site-header {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: var(--header-height);
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid rgba(232, 232, 232, 0.5);
            box-shadow: var(--shadow-nav);
            z-index: 1000;
            transition: background var(--transition-base);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 20px;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            flex-shrink: 0;
            color: var(--color-primary-dark);
            font-weight: 700;
            font-size: 1.3rem;
            transition: opacity var(--transition-base);
        }
        .site-logo:hover {
            opacity: 0.85;
            color: var(--color-primary-dark);
        }
        .logo-icon {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px;
            height: 36px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            border-radius: 8px;
            font-size: 1.2rem;
            font-weight: 700;
        }
        .logo-text {
            font-size: 1.2rem;
            letter-spacing: 1px;
        }

        .nav-list {
            display: flex;
            align-items: center;
            gap: 6px;
            flex-wrap: nowrap;
        }
        .nav-list a {
            display: inline-block;
            padding: 6px 16px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--color-primary-dark);
            border-radius: var(--radius-sm);
            transition: all var(--transition-base);
            position: relative;
            white-space: nowrap;
        }
        .nav-list a:hover {
            color: var(--color-primary);
            background: rgba(46, 139, 87, 0.06);
        }
        .nav-list a.active {
            color: var(--color-primary);
        }
        .nav-list a.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 60%;
            height: 3px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
            border-radius: 2px;
        }
        .nav-list a:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        .nav-cta {
            margin-left: 8px;
        }
        .nav-cta .btn {
            padding: 8px 24px;
            font-size: 0.9rem;
            white-space: nowrap;
        }

        .nav-badge {
            display: inline-flex;
            align-items: center;
            gap: 4px;
            padding: 3px 12px;
            background: linear-gradient(135deg, #E74C3C, #C0392B);
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 20px;
            margin-left: 4px;
            animation: pulse-badge 2s ease-in-out infinite;
            white-space: nowrap;
        }
        .nav-badge i {
            font-size: 0.7rem;
        }

        @keyframes pulse-badge {
            0%,
            100% {
                opacity: 1;
                transform: scale(1);
            }
            50% {
                opacity: 0.8;
                transform: scale(1.05);
            }
        }

        /* Hamburger */
        .hamburger {
            display: none;
            flex-direction: column;
            gap: 5px;
            cursor: pointer;
            padding: 4px;
            background: none;
            border: none;
            z-index: 1001;
        }
        .hamburger span {
            display: block;
            width: 26px;
            height: 2.5px;
            background: var(--color-primary-dark);
            border-radius: 2px;
            transition: all var(--transition-base);
        }
        .hamburger.active span:nth-child(1) {
            transform: rotate(45deg) translate(5px, 5px);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: rotate(-45deg) translate(5px, -5px);
        }

        /* ===== Hero Section ===== */
        .hero-section {
            position: relative;
            min-height: 70vh;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(26, 76, 46, 0.88), rgba(46, 139, 87, 0.78)),
                url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
            padding: 120px 20px 80px;
            text-align: center;
            overflow: hidden;
        }
        .hero-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: radial-gradient(circle at 30% 40%, rgba(218, 165, 32, 0.15), transparent 60%);
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            max-width: 860px;
        }
        .hero-badge {
            display: inline-block;
            padding: 6px 20px;
            background: rgba(255, 255, 255, 0.15);
            border: 1px solid rgba(255, 255, 255, 0.25);
            color: #fff;
            font-size: 0.85rem;
            font-weight: 500;
            border-radius: 20px;
            margin-bottom: 20px;
            backdrop-filter: blur(4px);
            letter-spacing: 2px;
        }
        .hero-section h1 {
            font-size: 3.2rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 20px;
            letter-spacing: 1px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.2);
        }
        .hero-section h1 .highlight {
            background: linear-gradient(90deg, var(--color-accent-light), #FFE4A0);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .hero-section .hero-sub {
            font-size: 1.15rem;
            color: rgba(255, 255, 255, 0.9);
            line-height: 1.8;
            margin-bottom: 36px;
            max-width: 640px;
            margin-left: auto;
            margin-right: auto;
        }
        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            justify-content: center;
        }
        .hero-actions .btn {
            padding: 14px 40px;
            font-size: 1.05rem;
        }
        .hero-actions .btn-secondary {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.7);
            color: #fff;
        }
        .hero-actions .btn-secondary:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            transform: scale(1.02);
        }

        .scroll-indicator {
            position: absolute;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            z-index: 2;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 6px;
            color: rgba(255, 255, 255, 0.6);
            font-size: 0.75rem;
            letter-spacing: 2px;
            animation: scroll-bounce 2s ease-in-out infinite;
            cursor: pointer;
        }
        .scroll-indicator i {
            font-size: 1.2rem;
        }
        @keyframes scroll-bounce {
            0%,
            100% {
                transform: translateX(-50%) translateY(0);
            }
            50% {
                transform: translateX(-50%) translateY(8px);
            }
        }

        /* ===== Section Common ===== */
        .section {
            padding: var(--spacing-section) 0;
        }
        .section-alt {
            background: #FFFFFF;
        }
        .section-dark {
            background: var(--color-bg-dark);
            color: var(--color-text-on-dark);
        }
        .section-dark .section-title,
        .section-dark .section-sub {
            color: #fff;
        }

        .section-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: var(--color-primary-dark);
            margin-bottom: 12px;
            text-align: center;
        }
        .section-title .highlight {
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .section-sub {
            font-size: 1.05rem;
            color: var(--color-text-light);
            text-align: center;
            max-width: 680px;
            margin: 0 auto 48px;
            line-height: 1.7;
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .section-header .section-title {
            margin-bottom: 12px;
        }
        .section-header .section-sub {
            margin-bottom: 0;
        }

        /* ===== Buttons ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            padding: 14px 36px;
            font-size: 1rem;
            font-weight: 600;
            border-radius: var(--radius-btn);
            border: none;
            cursor: pointer;
            transition: all var(--transition-base);
            text-decoration: none;
            line-height: 1.4;
            white-space: nowrap;
        }
        .btn:focus-visible {
            outline: 2px solid var(--color-accent);
            outline-offset: 2px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            box-shadow: 0 4px 16px rgba(46, 139, 87, 0.3);
        }
        .btn-primary:hover {
            background: linear-gradient(135deg, var(--color-accent), var(--color-primary));
            color: #fff;
            transform: scale(1.02);
            box-shadow: 0 6px 24px rgba(46, 139, 87, 0.4);
        }
        .btn-primary:active {
            transform: scale(0.98);
            box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.15);
        }
        .btn-primary:disabled {
            opacity: 0.5;
            cursor: not-allowed;
            transform: none;
        }

        .btn-secondary {
            background: transparent;
            border: 2px solid var(--color-primary);
            color: var(--color-primary);
        }
        .btn-secondary:hover {
            background: rgba(46, 139, 87, 0.08);
            color: var(--color-primary-dark);
            border-color: var(--color-primary-dark);
            transform: scale(1.02);
        }
        .btn-secondary:active {
            transform: scale(0.98);
        }

        .btn-outline-light {
            background: transparent;
            border: 2px solid rgba(255, 255, 255, 0.6);
            color: #fff;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: #fff;
            color: #fff;
            transform: scale(1.02);
        }

        .btn-sm {
            padding: 8px 20px;
            font-size: 0.85rem;
            border-radius: 16px;
        }

        /* ===== Stats / Data Badges ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 30px;
            max-width: 960px;
            margin: 0 auto;
        }
        .stat-item {
            text-align: center;
            padding: 24px 16px;
            background: var(--color-bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            border: 1px solid var(--color-border-light);
        }
        .stat-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: var(--color-primary);
        }
        .stat-number {
            font-size: 2.8rem;
            font-weight: 800;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
            margin-bottom: 4px;
        }
        .stat-label {
            font-size: 0.95rem;
            color: var(--color-text-light);
            font-weight: 500;
        }
        .stat-icon {
            font-size: 2rem;
            color: var(--color-accent);
            margin-bottom: 12px;
        }

        /* ===== Case Cards Grid ===== */
        .cases-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 30px;
        }
        .case-card {
            background: var(--color-bg-card);
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            border: 1px solid var(--color-border-light);
            display: flex;
            flex-direction: column;
        }
        .case-card:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-6px);
            border-color: var(--color-primary);
        }
        .case-card-image {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16 / 9;
            background: var(--color-border);
        }
        .case-card-image img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .case-card:hover .case-card-image img {
            transform: scale(1.05);
        }
        .case-card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            padding: 4px 14px;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            font-size: 0.75rem;
            font-weight: 600;
            border-radius: 20px;
            backdrop-filter: blur(4px);
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
        }
        .case-card-body {
            padding: 24px 20px 20px;
            flex: 1;
            display: flex;
            flex-direction: column;
        }
        .case-card-body h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--color-primary-dark);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .case-card-body p {
            font-size: 0.9rem;
            color: var(--color-text-light);
            line-height: 1.6;
            flex: 1;
            margin-bottom: 16px;
        }
        .case-card-meta {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 0.8rem;
            color: var(--color-text-lighter);
            border-top: 1px solid var(--color-border-light);
            padding-top: 14px;
            margin-top: auto;
        }
        .case-card-meta i {
            color: var(--color-accent);
            width: 16px;
        }
        .case-link {
            color: var(--color-primary);
            font-weight: 600;
            font-size: 0.9rem;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: gap var(--transition-base);
        }
        .case-link:hover {
            gap: 12px;
            color: var(--color-accent);
        }

        /* ===== Industry Coverage ===== */
        .industry-grid {
            display: grid;
            grid-template-columns: repeat(5, 1fr);
            gap: 20px;
        }
        .industry-item {
            text-align: center;
            padding: 28px 12px;
            background: var(--color-bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            border: 1px solid var(--color-border-light);
        }
        .industry-item:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
            border-color: var(--color-accent);
        }
        .industry-item .icon-wrap {
            width: 60px;
            height: 60px;
            margin: 0 auto 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, rgba(46, 139, 87, 0.08), rgba(218, 165, 32, 0.08));
            border-radius: 50%;
            font-size: 1.6rem;
            color: var(--color-primary);
            transition: all var(--transition-base);
        }
        .industry-item:hover .icon-wrap {
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            transform: scale(1.05);
        }
        .industry-item h4 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-primary-dark);
            margin-bottom: 4px;
        }
        .industry-item p {
            font-size: 0.8rem;
            color: var(--color-text-light);
        }

        /* ===== Process / Timeline ===== */
        .process-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }
        .process-grid::before {
            content: '';
            position: absolute;
            top: 48px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, var(--color-primary), var(--color-accent), var(--color-primary));
            opacity: 0.3;
            z-index: 0;
        }
        .process-step {
            text-align: center;
            position: relative;
            z-index: 1;
            padding: 20px 12px;
            background: var(--color-bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            transition: all var(--transition-base);
            border: 1px solid var(--color-border-light);
        }
        .process-step:hover {
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-4px);
        }
        .process-step .step-num {
            width: 52px;
            height: 52px;
            margin: 0 auto 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
            color: #fff;
            font-size: 1.3rem;
            font-weight: 800;
            border-radius: 50%;
            box-shadow: 0 4px 14px rgba(46, 139, 87, 0.25);
        }
        .process-step h4 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--color-primary-dark);
            margin-bottom: 6px;
        }
        .process-step p {
            font-size: 0.85rem;
            color: var(--color-text-light);
            line-height: 1.5;
        }

        /* ===== FAQ Accordion ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            overflow: hidden;
            border: 1px solid var(--color-border-light);
            transition: all var(--transition-base);
        }
        .faq-item:hover {
            border-color: var(--color-primary);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 20px 24px;
            cursor: pointer;
            background: #F9F9F9;
            transition: background var(--transition-base);
            user-select: none;
        }
        .faq-question:hover {
            background: #F0F0F0;
        }
        .faq-question h3 {
            font-size: 1rem;
            font-weight: 600;
            color: var(--color-primary-dark);
            margin: 0;
            flex: 1;
            padding-right: 12px;
        }
        .faq-question .faq-arrow {
            font-size: 1rem;
            color: var(--color-primary);
            transition: transform var(--transition-base);
            flex-shrink: 0;
        }
        .faq-item.active .faq-arrow {
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 24px;
            max-height: 0;
            overflow: hidden;
            transition: all 0.4s ease;
            background: var(--color-bg-card);
        }
        .faq-item.active .faq-answer {
            padding: 0 24px 20px;
            max-height: 400px;
        }
        .faq-answer p {
            font-size: 0.95rem;
            color: var(--color-text-light);
            line-height: 1.7;
        }

        /* ===== CTA Section ===== */
        .cta-section {
            background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary)),
                url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
            padding: 80px 20px;
            text-align: center;
            position: relative;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(26, 76, 46, 0.75);
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 2;
            max-width: 700px;
            margin: 0 auto;
        }
        .cta-content h2 {
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 16px;
        }
        .cta-content p {
            font-size: 1.05rem;
            color: rgba(255, 255, 255, 0.85);
            line-height: 1.7;
            margin-bottom: 32px;
        }
        .cta-content .btn {
            padding: 16px 48px;
            font-size: 1.1rem;
        }
        .cta-content .btn:hover {
            transform: scale(1.04);
        }

        /* ===== Contact Form ===== */
        .contact-wrap {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
            align-items: start;
        }
        .contact-info {
            padding: 32px;
            background: var(--color-bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border-light);
        }
        .contact-info h3 {
            font-size: 1.4rem;
            margin-bottom: 16px;
            color: var(--color-primary-dark);
        }
        .contact-info p {
            font-size: 0.95rem;
            color: var(--color-text-light);
            line-height: 1.7;
            margin-bottom: 24px;
        }
        .contact-info ul li {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 0;
            font-size: 0.95rem;
            color: var(--color-text);
            border-bottom: 1px solid var(--color-border-light);
        }
        .contact-info ul li:last-child {
            border-bottom: none;
        }
        .contact-info ul li i {
            width: 20px;
            color: var(--color-primary);
            font-size: 1.1rem;
        }

        .contact-form {
            padding: 32px;
            background: var(--color-bg-card);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--color-border-light);
        }
        .contact-form h3 {
            font-size: 1.4rem;
            margin-bottom: 20px;
            color: var(--color-primary-dark);
        }
        .form-group {
            margin-bottom: 18px;
        }
        .form-group label {
            display: block;
            font-size: 0.9rem;
            font-weight: 500;
            color: var(--color-text);
            margin-bottom: 6px;
        }
        .form-group label .required {
            color: #E74C3C;
        }
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 12px 16px;
            border: 1.5px solid var(--color-border);
            border-radius: var(--radius-input);
            background: #FAFAFA;
            font-size: 0.95rem;
            color: var(--color-text);
            transition: all var(--transition-base);
        }
        .form-group input:focus,
        .form-group textarea:focus {
            border-color: var(--color-primary);
            background: #fff;
            box-shadow: 0 0 0 3px rgba(46, 139, 87, 0.1);
        }
        .form-group textarea {
            min-height: 100px;
            resize: vertical;
        }
        .form-group .btn {
            width: 100%;
            padding: 14px;
            font-size: 1.05rem;
        }

        /* ===== Footer ===== */
        .site-footer {
            background: var(--color-bg-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 60px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.5fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }
        .footer-brand .site-logo {
            color: #fff;
            margin-bottom: 16px;
        }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.7);
            max-width: 340px;
        }
        .footer-col h4 {
            font-size: 1rem;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 8px;
        }
        .footer-col h4::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 30px;
            height: 2px;
            background: var(--color-accent);
            border-radius: 2px;
        }
        .footer-col ul li {
            margin-bottom: 8px;
        }
        .footer-col ul li a {
            color: rgba(255, 255, 255, 0.7);
            font-size: 0.9rem;
            transition: all var(--transition-base);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .footer-col ul li a:hover {
            color: var(--color-accent);
            padding-left: 4px;
        }
        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.7);
            padding: 4px 0;
        }
        .footer-contact li i {
            width: 16px;
            color: var(--color-accent);
        }
        .footer-bottom {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.5);
        }
        .footer-bottom span {
            margin: 4px 0;
        }

        /* ===== Mobile Nav Overlay ===== */
        .nav-overlay {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.4);
            z-index: 998;
            backdrop-filter: blur(4px);
        }
        .nav-overlay.show {
            display: block;
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 20px;
            }
            .cases-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .industry-grid {
                grid-template-columns: repeat(3, 1fr);
            }
            .process-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-grid::before {
                display: none;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .contact-wrap {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .hero-section h1 {
                font-size: 2.6rem;
            }
            :root {
                --spacing-section: 60px;
            }
        }

        @media (max-width: 768px) {
            .hamburger {
                display: flex;
            }
            .nav-list {
                position: fixed;
                top: 0;
                right: -100%;
                width: 300px;
                height: 100vh;
                background: #fff;
                flex-direction: column;
                align-items: flex-start;
                padding: 80px 24px 40px;
                box-shadow: -4px 0 30px rgba(0, 0, 0, 0.1);
                transition: right 0.4s ease;
                z-index: 999;
                gap: 8px;
                overflow-y: auto;
            }
            .nav-list.open {
                right: 0;
            }
            .nav-list a {
                width: 100%;
                padding: 12px 16px;
                font-size: 1.05rem;
                border-radius: 8px;
            }
            .nav-list a.active::after {
                display: none;
            }
            .nav-list a.active {
                background: rgba(46, 139, 87, 0.08);
                color: var(--color-primary);
            }
            .nav-cta {
                margin-left: 0;
                margin-top: 12px;
                width: 100%;
            }
            .nav-cta .btn {
                width: 100%;
                text-align: center;
            }
            .nav-badge {
                margin-left: 0;
                margin-top: 8px;
                align-self: flex-start;
            }
            .nav-overlay.show {
                display: block;
            }

            .hero-section {
                min-height: 60vh;
                padding: 100px 16px 60px;
            }
            .hero-section h1 {
                font-size: 2rem;
            }
            .hero-section .hero-sub {
                font-size: 1rem;
            }
            .hero-actions .btn {
                padding: 12px 28px;
                font-size: 0.95rem;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-number {
                font-size: 2.2rem;
            }

            .cases-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .industry-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .process-grid {
                grid-template-columns: 1fr;
                gap: 16px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 4px;
            }
            .contact-form,
            .contact-info {
                padding: 24px;
            }
            .section-title {
                font-size: 1.6rem;
            }
            .section-sub {
                font-size: 0.95rem;
                margin-bottom: 32px;
            }
            :root {
                --spacing-section: 48px;
            }
            .cta-content h2 {
                font-size: 1.6rem;
            }
            .cta-content .btn {
                padding: 14px 32px;
                font-size: 1rem;
            }
            .faq-question {
                padding: 16px 18px;
            }
            .faq-question h3 {
                font-size: 0.95rem;
            }
            .faq-answer p {
                font-size: 0.9rem;
            }
        }

        @media (max-width: 520px) {
            .hero-section h1 {
                font-size: 1.7rem;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 16px 10px;
            }
            .stat-number {
                font-size: 1.8rem;
            }
            .industry-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .industry-item {
                padding: 20px 10px;
            }
            .industry-item .icon-wrap {
                width: 48px;
                height: 48px;
                font-size: 1.3rem;
            }
            .section-title {
                font-size: 1.4rem;
            }
            :root {
                --spacing-section: 32px;
            }
            .cta-content h2 {
                font-size: 1.4rem;
            }
            .btn {
                padding: 12px 24px;
                font-size: 0.9rem;
            }
            .hero-actions {
                flex-direction: column;
                align-items: center;
            }
            .hero-actions .btn {
                width: 100%;
                max-width: 280px;
            }
            .footer-grid {
                gap: 20px;
            }
            .footer-col h4 {
                font-size: 0.95rem;
            }
            .footer-col ul li a,
            .footer-contact li {
                font-size: 0.85rem;
            }
        }

        /* ===== Smooth fade-in on scroll ===== */
        .fade-in {
            opacity: 0;
            transform: translateY(30px);
            transition: opacity 0.6s ease, transform 0.6s ease;
        }
        .fade-in.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== Empty state placeholder ===== */
        .empty-state {
            text-align: center;
            padding: 40px 20px;
            background: #F9F9F9;
            border: 2px dashed var(--color-border);
            border-radius: var(--radius-card);
            color: var(--color-text-lighter);
            font-size: 0.95rem;
        }
        .empty-state i {
            font-size: 2.4rem;
            color: var(--color-border);
            margin-bottom: 12px;
            display: block;
        }

/* roulang page: category2 */
/* ===== Design Variables ===== */
    :root {
        --color-primary: #2E8B57;
        --color-primary-dark: #1A4C2E;
        --color-primary-light: #3CB371;
        --color-accent: #DAA520;
        --color-accent-dark: #C5964A;
        --color-gold: #C5964A;
        --color-bg: #FDF8F0;
        --color-bg-card: #FFFFFF;
        --color-bg-dark: #1A4C2E;
        --color-text-heading: #1A4C2E;
        --color-text-body: #333333;
        --color-text-muted: #666666;
        --color-text-light: #999999;
        --color-border: #E8E8E8;
        --color-border-light: #F0F0F0;
        --color-white: #FFFFFF;
        --color-overlay: rgba(26, 76, 46, 0.75);
        --radius-card: 14px;
        --radius-btn: 20px;
        --radius-input: 8px;
        --radius-badge: 6px;
        --radius-image: 8px;
        --shadow-card: 0 4px 16px rgba(0, 0, 0, 0.05);
        --shadow-card-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
        --shadow-nav: 0 2px 10px rgba(0, 0, 0, 0.08);
        --shadow-modal: 0 10px 40px rgba(0, 0, 0, 0.15);
        --transition-base: all 0.3s ease;
        --font-sans: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
        --container-width: 1280px;
        --spacing-section: 80px;
        --spacing-section-tablet: 48px;
        --spacing-section-mobile: 32px;
    }

    /* ===== Reset & Base ===== */
    *,
    *::before,
    *::after {
        box-sizing: border-box;
        margin: 0;
        padding: 0;
    }

    html {
        scroll-behavior: smooth;
        -webkit-text-size-adjust: 100%;
    }

    body {
        font-family: var(--font-sans);
        font-size: 16px;
        line-height: 1.7;
        color: var(--color-text-body);
        background-color: var(--color-bg);
        -webkit-font-smoothing: antialiased;
        -moz-osx-font-smoothing: grayscale;
        overflow-x: hidden;
    }

    a {
        color: var(--color-primary);
        text-decoration: none;
        transition: var(--transition-base);
    }

    a:hover {
        color: var(--color-accent);
    }

    a:focus-visible {
        outline: 2px solid var(--color-primary);
        outline-offset: 2px;
        border-radius: 2px;
    }

    img {
        max-width: 100%;
        height: auto;
        display: block;
        border-radius: var(--radius-image);
    }

    button,
    input,
    textarea,
    select {
        font-family: inherit;
        font-size: inherit;
        line-height: inherit;
        border: none;
        outline: none;
    }

    ul,
    ol {
        list-style: none;
    }

    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
        color: var(--color-text-heading);
        font-weight: 700;
        line-height: 1.3;
    }

    /* ===== Container ===== */
    .container {
        width: 100%;
        max-width: var(--container-width);
        margin: 0 auto;
        padding: 0 24px;
    }

    /* ===== Header & Navigation ===== */
    .site-header {
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        z-index: 1000;
        background: rgba(253, 248, 240, 0.92);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        box-shadow: var(--shadow-nav);
        height: 68px;
        transition: var(--transition-base);
    }

    .site-header .container {
        display: flex;
        align-items: center;
        justify-content: space-between;
        height: 100%;
    }

    .site-logo {
        display: flex;
        align-items: center;
        gap: 8px;
        text-decoration: none;
        flex-shrink: 0;
    }

    .site-logo .logo-icon {
        width: 36px;
        height: 36px;
        background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
        color: #fff;
        border-radius: 8px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 20px;
        font-weight: 800;
        letter-spacing: 1px;
    }

    .site-logo .logo-text {
        font-size: 20px;
        font-weight: 700;
        color: var(--color-primary-dark);
        letter-spacing: 0.5px;
    }

    .site-logo:hover .logo-text {
        color: var(--color-primary);
    }

    .nav-list {
        display: flex;
        align-items: center;
        gap: 6px;
    }

    .nav-list a {
        padding: 8px 16px;
        font-size: 15px;
        font-weight: 500;
        color: var(--color-text-body);
        border-radius: 6px;
        transition: var(--transition-base);
        position: relative;
        white-space: nowrap;
    }

    .nav-list a:hover {
        color: var(--color-primary);
        background: rgba(46, 139, 87, 0.06);
    }

    .nav-list a.active {
        color: var(--color-primary);
        background: rgba(46, 139, 87, 0.1);
    }

    .nav-list a.active::after {
        content: '';
        position: absolute;
        bottom: 2px;
        left: 50%;
        transform: translateX(-50%);
        width: 20px;
        height: 3px;
        background: var(--color-primary);
        border-radius: 2px;
    }

    .nav-cta {
        margin-left: 8px;
    }

    .nav-badge {
        display: inline-flex;
        align-items: center;
        gap: 4px;
        background: linear-gradient(135deg, #E85D3A, #D43F2A);
        color: #fff;
        font-size: 11px;
        font-weight: 700;
        padding: 3px 10px;
        border-radius: 12px;
        letter-spacing: 0.3px;
        margin-left: 2px;
        animation: pulse-badge 2s ease-in-out infinite;
    }

    .nav-badge i {
        font-size: 10px;
    }

    @keyframes pulse-badge {
        0%,
        100% {
            transform: scale(1);
        }
        50% {
            transform: scale(1.05);
        }
    }

    .menu-toggle {
        display: none;
        flex-direction: column;
        gap: 5px;
        cursor: pointer;
        padding: 8px;
        background: none;
        border: none;
    }

    .menu-toggle span {
        width: 26px;
        height: 2.5px;
        background: var(--color-primary-dark);
        border-radius: 2px;
        transition: var(--transition-base);
    }

    /* ===== Mobile Nav ===== */
    @media (max-width: 1024px) {
        .nav-list {
            position: fixed;
            top: 68px;
            left: 0;
            width: 100%;
            background: var(--color-bg);
            flex-direction: column;
            padding: 20px 24px 30px;
            box-shadow: var(--shadow-nav);
            transform: translateY(-120%);
            opacity: 0;
            pointer-events: none;
            transition: var(--transition-base);
            z-index: 999;
            gap: 4px;
            border-top: 1px solid var(--color-border);
        }

        .nav-list.open {
            transform: translateY(0);
            opacity: 1;
            pointer-events: auto;
        }

        .nav-list a {
            width: 100%;
            padding: 12px 16px;
            font-size: 16px;
        }

        .nav-list a.active::after {
            display: none;
        }

        .nav-cta {
            margin-left: 0;
            margin-top: 12px;
            width: 100%;
        }

        .nav-cta .btn {
            width: 100%;
            text-align: center;
            justify-content: center;
        }

        .nav-badge {
            align-self: flex-start;
            margin-top: 8px;
        }

        .menu-toggle {
            display: flex;
        }
    }

    @media (max-width: 480px) {
        .site-logo .logo-text {
            font-size: 17px;
        }
        .site-logo .logo-icon {
            width: 32px;
            height: 32px;
            font-size: 17px;
        }
        .site-header {
            height: 60px;
        }
        .nav-list {
            top: 60px;
        }
    }

    /* ===== Button System ===== */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 14px 36px;
        font-size: 16px;
        font-weight: 600;
        border-radius: var(--radius-btn);
        cursor: pointer;
        transition: var(--transition-base);
        border: 1.5px solid transparent;
        text-decoration: none;
        white-space: nowrap;
        line-height: 1.2;
    }

    .btn-primary {
        background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
        color: var(--color-white);
        border-color: transparent;
    }

    .btn-primary:hover {
        background: linear-gradient(135deg, var(--color-accent), var(--color-primary));
        color: var(--color-white);
        transform: scale(1.02);
        box-shadow: 0 6px 20px rgba(46, 139, 87, 0.3);
    }

    .btn-primary:active {
        box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.15);
        transform: scale(0.98);
    }

    .btn-primary:disabled {
        opacity: 0.5;
        cursor: not-allowed;
        transform: none;
    }

    .btn-secondary {
        background: transparent;
        color: var(--color-white);
        border-color: var(--color-white);
    }

    .btn-secondary:hover {
        background: rgba(255, 255, 255, 0.12);
        color: var(--color-white);
        border-color: var(--color-white);
    }

    .btn-outline {
        background: transparent;
        color: var(--color-primary);
        border-color: var(--color-primary);
    }

    .btn-outline:hover {
        background: rgba(46, 139, 87, 0.08);
        color: var(--color-primary);
    }

    .btn-sm {
        padding: 8px 20px;
        font-size: 14px;
        border-radius: 16px;
    }

    .btn-lg {
        padding: 16px 44px;
        font-size: 18px;
    }

    /* ===== Section Spacing ===== */
    section {
        padding: var(--spacing-section) 0;
    }

    .section-title {
        font-size: 2rem;
        font-weight: 700;
        color: var(--color-text-heading);
        text-align: center;
        margin-bottom: 12px;
    }

    .section-subtitle {
        font-size: 1.05rem;
        color: var(--color-text-muted);
        text-align: center;
        max-width: 680px;
        margin: 0 auto 48px;
        line-height: 1.7;
    }

    .section-title-left {
        text-align: left;
        margin-bottom: 8px;
    }

    .section-subtitle-left {
        text-align: left;
        margin: 0 0 40px;
    }

    /* ===== Hero ===== */
    .page-hero {
        padding: 140px 0 80px;
        background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-accent) 100%);
        position: relative;
        overflow: hidden;
        min-height: 50vh;
        display: flex;
        align-items: center;
    }

    .page-hero::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
        opacity: 0.18;
        mix-blend-mode: overlay;
    }

    .page-hero::after {
        content: '';
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(26, 76, 46, 0.7) 0%, rgba(46, 139, 87, 0.4) 100%);
    }

    .page-hero .container {
        position: relative;
        z-index: 2;
        text-align: center;
    }

    .page-hero h1 {
        font-size: 3rem;
        color: var(--color-white);
        margin-bottom: 16px;
        font-weight: 800;
        letter-spacing: 1px;
        text-shadow: 0 2px 12px rgba(0, 0, 0, 0.15);
    }

    .page-hero p {
        font-size: 1.2rem;
        color: rgba(255, 255, 255, 0.9);
        max-width: 640px;
        margin: 0 auto 32px;
        line-height: 1.8;
    }

    .page-hero .hero-breadcrumb {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        font-size: 14px;
        color: rgba(255, 255, 255, 0.7);
        margin-bottom: 24px;
    }

    .page-hero .hero-breadcrumb a {
        color: rgba(255, 255, 255, 0.8);
        text-decoration: none;
    }

    .page-hero .hero-breadcrumb a:hover {
        color: #fff;
    }

    .page-hero .hero-breadcrumb span {
        color: rgba(255, 255, 255, 0.5);
    }

    .page-hero .hero-actions {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 16px;
        flex-wrap: wrap;
    }

    @media (max-width: 768px) {
        .page-hero {
            padding: 110px 0 60px;
            min-height: 40vh;
        }
        .page-hero h1 {
            font-size: 2rem;
        }
        .page-hero p {
            font-size: 1rem;
        }
        .page-hero .hero-actions {
            flex-direction: column;
            gap: 12px;
        }
        .page-hero .hero-actions .btn {
            width: 100%;
            max-width: 300px;
        }
    }

    @media (max-width: 480px) {
        .page-hero h1 {
            font-size: 1.6rem;
        }
        .page-hero p {
            font-size: 0.92rem;
        }
    }

    /* ===== Service Overview ===== */
    .service-overview {
        background: var(--color-white);
    }

    .service-grid {
        display: grid;
        grid-template-columns: repeat(3, 1fr);
        gap: 28px;
    }

    .service-card {
        background: var(--color-bg-card);
        border-radius: var(--radius-card);
        padding: 32px 28px;
        box-shadow: var(--shadow-card);
        border: 1px solid var(--color-border-light);
        transition: var(--transition-base);
        position: relative;
        overflow: hidden;
    }

    .service-card::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 4px;
        background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
        opacity: 0;
        transition: var(--transition-base);
    }

    .service-card:hover {
        box-shadow: var(--shadow-card-hover);
        border-color: var(--color-primary);
        transform: translateY(-4px);
    }

    .service-card:hover::before {
        opacity: 1;
    }

    .service-card .icon-wrap {
        width: 56px;
        height: 56px;
        background: linear-gradient(135deg, rgba(46, 139, 87, 0.1), rgba(218, 165, 32, 0.1));
        border-radius: 14px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 24px;
        color: var(--color-primary);
        margin-bottom: 20px;
        transition: var(--transition-base);
    }

    .service-card:hover .icon-wrap {
        background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
        color: var(--color-white);
    }

    .service-card h3 {
        font-size: 1.2rem;
        margin-bottom: 10px;
        color: var(--color-text-heading);
    }

    .service-card p {
        font-size: 0.95rem;
        color: var(--color-text-muted);
        line-height: 1.7;
        margin-bottom: 16px;
    }

    .service-card .tag-list {
        display: flex;
        flex-wrap: wrap;
        gap: 6px;
        margin-top: 12px;
    }

    .service-card .tag {
        font-size: 12px;
        padding: 3px 10px;
        background: rgba(46, 139, 87, 0.08);
        color: var(--color-primary);
        border-radius: 12px;
        font-weight: 500;
    }

    @media (max-width: 1024px) {
        .service-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
    }

    @media (max-width: 640px) {
        .service-grid {
            grid-template-columns: 1fr;
            gap: 16px;
        }
        .service-card {
            padding: 24px 20px;
        }
    }

    /* ===== Process / Flow ===== */
    .process-section {
        background: var(--color-bg);
    }

    .process-steps {
        display: flex;
        justify-content: space-between;
        gap: 20px;
        position: relative;
        counter-reset: step;
    }

    .process-steps::before {
        content: '';
        position: absolute;
        top: 44px;
        left: 60px;
        right: 60px;
        height: 3px;
        background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
        border-radius: 2px;
        z-index: 0;
    }

    .step-item {
        flex: 1;
        text-align: center;
        position: relative;
        z-index: 1;
        counter-increment: step;
    }

    .step-number {
        width: 64px;
        height: 64px;
        background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
        color: var(--color-white);
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.6rem;
        font-weight: 700;
        margin: 0 auto 16px;
        box-shadow: 0 4px 16px rgba(46, 139, 87, 0.25);
        position: relative;
    }

    .step-item h4 {
        font-size: 1.05rem;
        color: var(--color-text-heading);
        margin-bottom: 6px;
    }

    .step-item p {
        font-size: 0.88rem;
        color: var(--color-text-muted);
        max-width: 220px;
        margin: 0 auto;
        line-height: 1.6;
    }

    @media (max-width: 768px) {
        .process-steps {
            flex-direction: column;
            gap: 32px;
            counter-reset: step;
        }
        .process-steps::before {
            display: none;
        }
        .step-item {
            display: flex;
            align-items: flex-start;
            gap: 16px;
            text-align: left;
        }
        .step-number {
            flex-shrink: 0;
            width: 48px;
            height: 48px;
            font-size: 1.2rem;
            margin: 0;
        }
        .step-item p {
            max-width: 100%;
            margin: 0;
        }
    }

    /* ===== Stats / Data Section ===== */
    .stats-section {
        background: var(--color-primary-dark);
        position: relative;
        overflow: hidden;
    }

    .stats-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-3.webp') center center / cover no-repeat;
        opacity: 0.08;
        mix-blend-mode: overlay;
    }

    .stats-section .container {
        position: relative;
        z-index: 1;
    }

    .stats-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 32px;
        text-align: center;
    }

    .stat-item {
        padding: 20px;
    }

    .stat-number {
        font-size: 2.8rem;
        font-weight: 800;
        color: var(--color-white);
        line-height: 1.2;
        margin-bottom: 6px;
        background: linear-gradient(135deg, #fff, var(--color-accent));
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
    }

    .stat-label {
        font-size: 1rem;
        color: rgba(255, 255, 255, 0.8);
        font-weight: 500;
    }

    @media (max-width: 768px) {
        .stats-grid {
            grid-template-columns: repeat(2, 1fr);
            gap: 20px;
        }
        .stat-number {
            font-size: 2.2rem;
        }
    }

    @media (max-width: 480px) {
        .stats-grid {
            grid-template-columns: 1fr 1fr;
            gap: 16px;
        }
        .stat-number {
            font-size: 1.8rem;
        }
    }

    /* ===== Case Showcase ===== */
    .case-showcase {
        background: var(--color-white);
    }

    .case-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 28px;
    }

    .case-card {
        border-radius: var(--radius-card);
        overflow: hidden;
        box-shadow: var(--shadow-card);
        background: var(--color-bg-card);
        border: 1px solid var(--color-border-light);
        transition: var(--transition-base);
    }

    .case-card:hover {
        box-shadow: var(--shadow-card-hover);
        transform: translateY(-3px);
    }

    .case-card .case-image {
        width: 100%;
        aspect-ratio: 16 / 9;
        object-fit: cover;
        border-radius: 0;
    }

    .case-card .case-body {
        padding: 24px 24px 28px;
    }

    .case-card .case-tag {
        display: inline-block;
        font-size: 12px;
        padding: 3px 12px;
        background: rgba(218, 165, 32, 0.12);
        color: var(--color-accent-dark);
        border-radius: 12px;
        font-weight: 600;
        margin-bottom: 10px;
    }

    .case-card h3 {
        font-size: 1.15rem;
        margin-bottom: 8px;
        color: var(--color-text-heading);
    }

    .case-card p {
        font-size: 0.92rem;
        color: var(--color-text-muted);
        line-height: 1.7;
        margin-bottom: 14px;
    }

    .case-card .case-link {
        font-weight: 600;
        font-size: 0.92rem;
        color: var(--color-primary);
        display: inline-flex;
        align-items: center;
        gap: 6px;
    }

    .case-card .case-link:hover {
        color: var(--color-accent);
        gap: 10px;
    }

    @media (max-width: 768px) {
        .case-grid {
            grid-template-columns: 1fr;
            gap: 20px;
        }
    }

    /* ===== Feature / Why Us ===== */
    .feature-section {
        background: var(--color-bg);
    }

    .feature-grid {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
        align-items: center;
    }

    .feature-image {
        border-radius: var(--radius-card);
        overflow: hidden;
        box-shadow: var(--shadow-card);
    }

    .feature-image img {
        width: 100%;
        aspect-ratio: 4 / 3;
        object-fit: cover;
    }

    .feature-content h2 {
        font-size: 1.8rem;
        margin-bottom: 16px;
    }

    .feature-content p {
        font-size: 1rem;
        color: var(--color-text-muted);
        line-height: 1.8;
        margin-bottom: 20px;
    }

    .feature-list {
        display: flex;
        flex-direction: column;
        gap: 12px;
    }

    .feature-list li {
        display: flex;
        align-items: flex-start;
        gap: 12px;
        font-size: 0.95rem;
        color: var(--color-text-body);
    }

    .feature-list li i {
        color: var(--color-primary);
        font-size: 1.1rem;
        margin-top: 3px;
        flex-shrink: 0;
    }

    @media (max-width: 768px) {
        .feature-grid {
            grid-template-columns: 1fr;
            gap: 28px;
        }
        .feature-content h2 {
            font-size: 1.4rem;
        }
        .feature-image {
            order: -1;
        }
    }

    /* ===== FAQ ===== */
    .faq-section {
        background: var(--color-white);
    }

    .faq-list {
        max-width: 800px;
        margin: 0 auto;
        display: flex;
        flex-direction: column;
        gap: 8px;
    }

    .faq-item {
        border: 1px solid var(--color-border);
        border-radius: var(--radius-card);
        overflow: hidden;
        transition: var(--transition-base);
    }

    .faq-item:hover {
        border-color: var(--color-primary);
    }

    .faq-question {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 20px 24px;
        cursor: pointer;
        background: var(--color-bg);
        transition: var(--transition-base);
        user-select: none;
        gap: 12px;
    }

    .faq-question h3 {
        font-size: 1rem;
        font-weight: 600;
        color: var(--color-text-heading);
        margin: 0;
        line-height: 1.4;
        flex: 1;
    }

    .faq-question .faq-icon {
        font-size: 1rem;
        color: var(--color-primary);
        transition: var(--transition-base);
        flex-shrink: 0;
        width: 24px;
        text-align: center;
    }

    .faq-item.open .faq-question {
        background: rgba(46, 139, 87, 0.04);
    }

    .faq-item.open .faq-icon {
        transform: rotate(180deg);
    }

    .faq-answer {
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.35s ease, padding 0.35s ease;
        padding: 0 24px;
        background: var(--color-bg-card);
    }

    .faq-item.open .faq-answer {
        max-height: 300px;
        padding: 0 24px 20px;
    }

    .faq-answer p {
        font-size: 0.95rem;
        color: var(--color-text-muted);
        line-height: 1.8;
        padding-top: 4px;
    }

    @media (max-width: 640px) {
        .faq-question {
            padding: 16px 18px;
        }
        .faq-question h3 {
            font-size: 0.92rem;
        }
        .faq-item.open .faq-answer {
            padding: 0 18px 16px;
        }
    }

    /* ===== CTA Section ===== */
    .cta-section {
        background: linear-gradient(135deg, var(--color-primary-dark), var(--color-primary), var(--color-accent));
        position: relative;
        overflow: hidden;
        text-align: center;
        padding: 80px 0;
    }

    .cta-section::before {
        content: '';
        position: absolute;
        inset: 0;
        background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
        opacity: 0.1;
        mix-blend-mode: overlay;
    }

    .cta-section .container {
        position: relative;
        z-index: 1;
    }

    .cta-section h2 {
        font-size: 2.2rem;
        color: var(--color-white);
        margin-bottom: 12px;
        font-weight: 800;
    }

    .cta-section p {
        font-size: 1.1rem;
        color: rgba(255, 255, 255, 0.9);
        max-width: 560px;
        margin: 0 auto 32px;
        line-height: 1.7;
    }

    .cta-section .btn-primary {
        background: var(--color-white);
        color: var(--color-primary-dark);
        border-color: var(--color-white);
    }

    .cta-section .btn-primary:hover {
        background: rgba(255, 255, 255, 0.9);
        color: var(--color-primary-dark);
        transform: scale(1.02);
        box-shadow: 0 6px 24px rgba(0, 0, 0, 0.2);
    }

    .cta-section .btn-secondary {
        border-color: rgba(255, 255, 255, 0.7);
        color: var(--color-white);
    }

    .cta-section .btn-secondary:hover {
        background: rgba(255, 255, 255, 0.12);
        border-color: #fff;
    }

    @media (max-width: 640px) {
        .cta-section h2 {
            font-size: 1.6rem;
        }
        .cta-section p {
            font-size: 0.95rem;
        }
        .cta-section .hero-actions {
            flex-direction: column;
            gap: 12px;
        }
        .cta-section .hero-actions .btn {
            width: 100%;
            max-width: 300px;
        }
    }

    /* ===== Footer ===== */
    .site-footer {
        background: var(--color-bg-dark);
        color: rgba(255, 255, 255, 0.85);
        padding: 60px 0 0;
    }

    .site-footer .footer-grid {
        display: grid;
        grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
        gap: 40px;
        padding-bottom: 40px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .site-footer .footer-brand .site-logo {
        margin-bottom: 16px;
    }

    .site-footer .footer-brand .site-logo .logo-text {
        color: #fff;
    }

    .site-footer .footer-brand p {
        font-size: 0.92rem;
        color: rgba(255, 255, 255, 0.65);
        line-height: 1.8;
        max-width: 360px;
    }

    .site-footer .footer-col h4 {
        font-size: 1rem;
        color: var(--color-white);
        margin-bottom: 18px;
        font-weight: 600;
    }

    .site-footer .footer-col ul {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }

    .site-footer .footer-col ul li a {
        font-size: 0.92rem;
        color: rgba(255, 255, 255, 0.65);
        transition: var(--transition-base);
        text-decoration: none;
    }

    .site-footer .footer-col ul li a:hover {
        color: var(--color-accent);
        padding-left: 4px;
    }

    .site-footer .footer-contact li {
        font-size: 0.9rem;
        color: rgba(255, 255, 255, 0.65);
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .site-footer .footer-contact li i {
        width: 16px;
        color: var(--color-accent);
        font-size: 0.85rem;
    }

    .site-footer .footer-bottom {
        display: flex;
        align-items: center;
        justify-content: space-between;
        padding: 24px 0;
        font-size: 0.85rem;
        color: rgba(255, 255, 255, 0.5);
        flex-wrap: wrap;
        gap: 12px;
    }

    @media (max-width: 768px) {
        .site-footer .footer-grid {
            grid-template-columns: 1fr 1fr;
            gap: 32px 24px;
        }
        .site-footer .footer-brand {
            grid-column: 1 / -1;
        }
        .site-footer .footer-brand p {
            max-width: 100%;
        }
    }

    @media (max-width: 480px) {
        .site-footer .footer-grid {
            grid-template-columns: 1fr;
            gap: 24px;
        }
        .site-footer .footer-bottom {
            flex-direction: column;
            text-align: center;
        }
    }

    /* ===== Responsive Utilities ===== */
    @media (max-width: 1024px) {
        :root {
            --spacing-section: 60px;
        }
        section {
            padding: var(--spacing-section) 0;
        }
        .section-title {
            font-size: 1.7rem;
        }
        .section-subtitle {
            font-size: 0.95rem;
            margin-bottom: 32px;
        }
    }

    @media (max-width: 768px) {
        :root {
            --spacing-section: 48px;
        }
        .container {
            padding: 0 18px;
        }
        .section-title {
            font-size: 1.4rem;
        }
        .section-subtitle {
            font-size: 0.9rem;
            margin-bottom: 28px;
        }
    }

    @media (max-width: 480px) {
        :root {
            --spacing-section: 32px;
        }
        .container {
            padding: 0 14px;
        }
        .btn {
            padding: 12px 28px;
            font-size: 14px;
        }
        .btn-lg {
            padding: 14px 32px;
            font-size: 15px;
        }
    }

    /* ===== Scroll Indicator ===== */
    .scroll-indicator {
        position: absolute;
        bottom: 30px;
        left: 50%;
        transform: translateX(-50%);
        z-index: 2;
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 6px;
        color: rgba(255, 255, 255, 0.7);
        font-size: 12px;
        animation: bounce-down 2s ease-in-out infinite;
    }

    .scroll-indicator i {
        font-size: 18px;
    }

    @keyframes bounce-down {
        0%,
        100% {
            transform: translateX(-50%) translateY(0);
        }
        50% {
            transform: translateX(-50%) translateY(8px);
        }
    }

    /* ===== Smooth divider ===== */
    .section-divider {
        width: 60px;
        height: 4px;
        background: linear-gradient(90deg, var(--color-primary), var(--color-accent));
        border-radius: 2px;
        margin: 0 auto 16px;
    }

    .section-divider-left {
        margin: 0 0 16px;
    }

    /* ===== Tag Badge ===== */
    .badge-gold {
        display: inline-block;
        font-size: 12px;
        padding: 3px 14px;
        background: rgba(218, 165, 32, 0.12);
        color: var(--color-accent-dark);
        border-radius: 12px;
        font-weight: 600;
        letter-spacing: 0.3px;
    }

    /* ===== Back to top ===== */
    .back-to-top {
        position: fixed;
        bottom: 30px;
        right: 30px;
        width: 44px;
        height: 44px;
        background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
        color: #fff;
        border-radius: 50%;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 18px;
        box-shadow: 0 4px 16px rgba(46, 139, 87, 0.3);
        z-index: 99;
        transition: var(--transition-base);
        opacity: 0;
        visibility: hidden;
        transform: translateY(20px);
        text-decoration: none;
    }

    .back-to-top.visible {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
    }

    .back-to-top:hover {
        transform: translateY(-4px);
        box-shadow: 0 6px 24px rgba(46, 139, 87, 0.4);
        color: #fff;
    }

    @media (max-width: 480px) {
        .back-to-top {
            width: 38px;
            height: 38px;
            font-size: 15px;
            bottom: 20px;
            right: 20px;
        }
    }